Tag: Claude Code

  • Claude at Scale: Every Usage Limit, Context Window, and File Size Cap (May 2026)

    Claude at Scale: Every Usage Limit, Context Window, and File Size Cap (May 2026)

    Last refreshed: June 9, 2026

    Claude usage limits at scale - context window, file size, team seats, extra usage
    Once you stop asking what Claude is and start asking how to use it at scale, the limits become the conversation.

    Once you stop asking “what is Claude” and start asking “how do I use Claude at scale,” you run into a different category of question. How big is the context window, actually, in this specific situation? What’s the file upload limit? What happens when one teammate burns through the Team plan? Where does the 1M context window apply and where doesn’t it? When does extra usage kick in and what does it cost?

    The answers exist — they’re just spread across a dozen Anthropic Help Center articles, and the wrong combination of guesses can make you think you’ve hit a hard limit when you’ve actually just hit the wrong setting. This article is the consolidated map. Triple-sourced against Anthropic’s official documentation, verified May 15, 2026.

    Claude Usage Limits by Plan (June 2026)

    Plan Messages/Day Context Window File Upload Projects
    Free Limited (varies) 200K tokens Up to 10MB per file No
    Pro ($20/mo) ~2,000 (Sonnet) 1M tokens (Fable 5 / Opus 4.8 / Sonnet 5) Up to 30MB per file Yes
    Max 5x ($100/mo) ~10,000 (Sonnet) 1M tokens Up to 30MB per file Yes
    Max 20x ($200/mo) ~40,000 (Sonnet) 1M tokens Up to 30MB per file Yes
    Team ($25/seat/mo) ~2,000/seat 1M tokens Up to 30MB per file Yes
    API (pay-per-token) Rate-limited by tier 1M tokens (Fable 5 / Opus 4.8 / Sonnet 5) Per API limits Via system prompt

    Message limits are approximate and vary by model. Anthropic adjusts limits based on system load. Verified June 9, 2026.

    The four limits that matter most

    If you’re running Claude in any sustained capacity, four limits will define your experience. Get these right and you have headroom. Get them wrong and you’ll think Claude is broken when it’s actually working as designed.

    1. Context window — how much Claude can read in a single conversation. Varies by model and surface. The 1M window is real but only available in specific places.

    2. File upload size — how big a single file can be. 30 MB cap per file across the board, with workarounds for larger files.

    3. Usage limits — how much Claude work you can do per session/week. Per-user, not pooled. Different limits for chat vs Claude Code vs Agent SDK.

    4. Extra usage / overage — what happens when you hit the cap. Either you’ve enabled it and you keep going at API rates, or you’re stopped until the limit resets.

    Context window: where 1M tokens actually applies

    Per Anthropic’s Help Center documentation (verified May 15, 2026), context window size depends on the model AND on the surface you’re using Claude through. This is the single most-misunderstood limit because the same model can have a different context window in chat than it does in Claude Code or the API.

    Web and desktop chat (claude.ai):

    • Opus 4.8, Opus 4.6, Sonnet 5 — 500K tokens on all paid plans
    • All other models — 200K tokens on paid plans

    Claude Code:

    • Opus 4.8 — 1M tokens on Pro, Max, Team, and Enterprise
    • Sonnet 5 — 1M tokens on all paid plans, but extra usage must be enabled to access it (except on usage-based Enterprise plans)

    Claude API:

    • Opus 4.8, Opus 4.6, Sonnet 5 — 1M tokens at standard pricing (no long-context premium)
    • All other models — 200K tokens

    The practical translation: if you need the full 1M token window, use Claude Code or the API with one of the supported models. The web chat tops out at 500K even on the most capable models. That difference matters when you’re trying to feed Claude an entire codebase, a long video transcript, or a multi-document research bundle.

    File upload size: 30 MB per file, with workarounds

    Per Anthropic’s Help Center, the maximum file size for both uploads and downloads is 30 MB per file. This applies whether you’re uploading a PDF, a CSV, an image, or any other supported file type.

    For PDFs larger than 30 MB, Anthropic’s documentation notes that Claude can process them through its computing environment without loading them into the context window. That’s a real workaround for big PDFs but it doesn’t help you for other large file types.

    If you regularly hit the 30 MB cap, the practical patterns are:

    • Split before upload — break the file into chunks under 30 MB, upload each, work with them as separate sources
    • Convert format — a 35 MB Word doc with embedded images may compress to under 30 MB as a PDF; CSVs can often be reduced by removing unused columns
    • Upload to GCS or S3 and let Claude read via tools — for the Agent SDK / API path, you can put the file in cloud storage and have Claude read it via web fetch or a custom tool, bypassing the upload cap entirely

    Usage limits: per-user, not pooled

    This is the limit that confuses teams the most. Per Anthropic’s Help Center documentation on the Team plan (verified May 15, 2026): each team member has their own set of usage limits. They are not shared across the team.

    If one teammate burns through their session limit, the rest of the team is unaffected. There is no pooled team allowance that one user can drain on behalf of others. The math is per-seat, always.

    The usage limits themselves vary by seat type:

    • Standard Team seats — 1.25x more usage per session than Pro plan. One weekly usage limit applies across all models. Resets seven days after the session starts.
    • Premium Team seats — 6.25x more usage per session than Pro plan. Two weekly limits: one across all models, plus a separate one for Sonnet models specifically. Both reset seven days after session start.

    For the actual numeric token-per-session limits, Anthropic does not publish exact numbers — they describe relative multipliers vs Pro. This is intentional; the underlying math is calibrated against typical workloads rather than a hard token ceiling.

    Extra usage: what happens when you hit the cap

    When a user hits their weekly limit, two things can happen depending on whether the organization has enabled extra usage:

    If extra usage is enabled: additional Claude requests continue to flow at standard API rates (the same per-token pricing published on Anthropic’s pricing docs — $10/$50 MTok for Fable 5, $5/$25 MTok for Opus 4.8, $3/$15 for Sonnet 5, $1/$5 for Haiku 4.5). Extra usage is billed separately from the subscription. Team and Enterprise admins can enable, cap, and monitor extra usage at the organization level.

    If extra usage is not enabled: the user’s Claude requests stop until their limit resets at the start of the next session window (seven days from when the current session started, not a fixed weekly day).

    The right setting depends on your team’s tolerance for surprise bills versus interrupted workflows. Most production teams enable extra usage with a hard organizational cap so individual users have continuity but the org has predictable spend ceiling.

    Claude Code limits: a separate model

    Claude Code has its own usage limit accounting that exists alongside chat usage limits. Per Anthropic’s Help Center on Claude Code models, usage, and limits (verified May 15, 2026):

    • Interactive Claude Code (typing in terminal/IDE) draws from your subscription’s usage limits, the same pool as web chat
    • Non-interactive claude -p mode currently also draws from subscription usage limits — until June 15, 2026
    • Starting June 15, 2026, non-interactive mode and Agent SDK usage move to a separate per-user monthly Agent SDK credit pool

    The June 15 change is important enough that it gets its own breakdown in our Agent SDK Dual-Bucket Billing article. The short version: if you’re running unattended Claude Code work in cron jobs or CI, your billing model is changing. Plan capacity against the new credit pool.

    The limits that aren’t really limits

    Three things that get reported as limits but are actually configuration choices:

    “My context window keeps filling up.” This is usually caused by long-running conversations accumulating history rather than the model’s actual context window being too small. Starting a new conversation (or running /clear in Claude Code) resets the working context. Long sessions are not a hard limit; they are a working-memory pressure that compounds over turns.

    “Claude won’t read my whole repository.” Repository size is rarely the actual limit; the limit is how much you can load into the context window at once. Tools like Claude Code’s file reading and search work around this by loading files on demand rather than upfront. The 1M context window helps but is not a substitute for selective loading.

    “My team keeps hitting limits even though we’re on Team.” Almost always one of two things: (a) people are mistakenly assuming the seat allowance is shared, when it’s strictly per-user; (b) someone is running heavy automation through a subscription seat instead of a Claude Developer Platform API key (which is the recommended path for sustained team-wide automation, especially after June 15).

    Decision matrix: which limits affect which use case

    Map your use case to the limits that actually apply:

    • Solo chat user on Pro — 500K context on Fable 5/Opus 4.8/Sonnet 5 in chat, weekly session limit, 30 MB upload cap. Hit your limit and you wait or pay extra usage.
    • Solo developer using Claude Code — 1M context on Opus 4.8 (1M on Sonnet 5 with extra usage on). Same weekly session limit. June 15 billing change applies if you use claude -p.
    • Small team on Team Standard — Per-seat limits at 1.25x Pro session capacity, not pooled. 30 MB upload cap. June 15 billing change applies per-seat.
    • Team running Claude Code in CI — All of the above plus separate Agent SDK credit pool starting June 15. Strongly consider a Developer Platform API key for the CI workload to get true pay-as-you-go billing.
    • Enterprise running large-scale automation — Subscription limits are the wrong tool. Move to a Developer Platform API key, monitor usage at the org level, set spend caps in the Console.

    What to actually do this week

    1. Identify which surface you’re using Claude through (web, Claude Code, API). Different surfaces have different context windows even for the same model.
    2. If you’re hitting “limit” errors, check whether extra usage is enabled at the organization level before assuming it’s a hard cap.
    3. If you’re a Team admin and your team is reporting hitting limits, audit per-seat usage rather than assuming you need to upgrade the plan — the issue is often one heavy user, not the plan tier.
    4. If anyone on your team is running unattended Claude work, read the Agent SDK billing change before June 15.
    5. If you need the full 1M context window, switch to Claude Code or the API. Web chat tops out at 500K.
    6. For uploads larger than 30 MB, split, compress, or move the file to cloud storage and have Claude read it via tools.

    Frequently Asked Questions

    Is the Claude Team plan usage limit shared across team members?

    No. Per Anthropic’s Help Center documentation, each team member has their own set of usage limits. If one team member reaches their seat’s included limit, other team members are unaffected and can keep working.

    What is Claude’s file upload size limit?

    30 MB per file for both uploads and downloads, per Anthropic’s official documentation. For PDFs larger than 30 MB, Claude can process them through its computing environment without loading them into the context window.

    Where does the 1M token context window actually apply?

    1M context is available on Claude Code with Opus 4.8 (Pro/Max/Team/Enterprise) and on the API with Fable 5, Opus 4.8, and Sonnet 5. Web chat tops out at 500K tokens even on the most capable models. Sonnet 5 in Claude Code requires extra usage to be enabled to access the 1M window (except on usage-based Enterprise plans).

    What’s the difference between Standard and Premium Team seats?

    Standard seats offer 1.25x Pro plan usage per session with one weekly limit across all models. Premium seats offer 6.25x Pro session usage with two weekly limits (one across all models, one Sonnet-specific). Both reset seven days after the session starts.

    What happens when I hit my Claude usage limit?

    If extra usage is enabled at your organization, you continue at standard API rates billed separately. If extra usage is not enabled, your requests stop until your limit resets at the next session window (seven days from session start, not a fixed weekly day).

    Should I use a Team plan or the API for production automation?

    For sustained shared automation (CI pipelines, cron jobs, background services), Anthropic recommends the Claude Developer Platform with an API key over subscription seats. Subscription seats are sized for individual interactive use; API keys give you predictable pay-as-you-go billing, no per-seat caps, and don’t compete with team members’ interactive usage.

    Related Reading

    How we sourced this

    Sources reviewed May 15, 2026:

    • Anthropic Help Center: Understanding usage and length limits, What is the Team plan?, How is my Team plan bill calculated?, Manage extra usage for Team and seat-based Enterprise plans, Models, usage, and limits in Claude Code, How large is the context window on paid Claude plans?, How large is the Claude API’s context window?, Upload files to Claude (primary sources for all limit specifics)
    • Anthropic platform documentation: Context windows at docs.claude.com (primary source for API context window behavior)
    • Anthropic Help Center: Use the Claude Agent SDK with your Claude plan (primary source for the June 15, 2026 billing change)

    All limit numbers and policies are accurate as of May 15, 2026. Anthropic adjusts subscription mechanics regularly; if you’re making procurement decisions on this article more than 60 days from the date stamp, re-verify the per-seat multipliers and context window availability against the current Help Center.

    Frequently Asked Questions

    What is Claude’s message limit per day?

    Message limits vary by plan. Free: limited daily messages (Anthropic adjusts based on load). Pro ($20/month): approximately 2,000 Sonnet-equivalent messages per day. Max 5x ($100/month): approximately 10,000. Max 20x ($200/month): approximately 40,000. API users are rate-limited by tier with no hard daily message cap, instead governed by tokens-per-minute limits.

    What is Claude’s maximum context window in 2026?

    Claude Fable 5, Claude Opus 4.8, and Claude Sonnet 5 all support a 1 million token context window. Claude Haiku 4.5 supports 200,000 tokens. Anthropic eliminated long-context surcharges in March 2026, so large-context requests are billed at standard per-token rates. The Free plan is limited to 200K context even on Sonnet.

    What is the maximum file size I can upload to Claude?

    On Pro, Max, and Team plans: up to 30MB per file, up to 5 files per conversation. Supported formats include PDF, text, CSV, code files, and images. The Free tier supports up to 10MB per file. For API users, file uploads are handled via the Files API with a 32MB per file limit.

    How do I scale Claude beyond subscription message limits?

    For high-volume workloads, switch to the Claude API (pay-per-token, no daily message cap beyond rate limits). Enterprise plans offer higher rate limits and custom agreements. The Batch API processes large jobs at 50% off standard prices for non-real-time workloads. Claude Max 20x ($200/month) is the highest subscription tier for interactive use.

    What are Claude’s API rate limits?

    API rate limits depend on your usage tier. New API accounts start at Tier 1 with lower limits. Spending history and account age automatically promote accounts to higher tiers with increased requests-per-minute and tokens-per-minute. Current tier limits are published at console.anthropic.com/settings/limits. Enterprise customers can negotiate custom rate limits.

    Does Claude have a token limit per message?

    There is no enforced per-message token limit separate from the overall context window. A single message can use up to the full context window (1M tokens for Fable 5 / Opus 4.8 / Sonnet 5, 200K for Haiku 4.5). However, very long single messages may be slower to process. The practical limit is the context window of whichever model you are using.

  • Deploy Claude Code: The 2026 Production Team Guide

    Deploy Claude Code: The 2026 Production Team Guide

    Last refreshed: May 15, 2026

    Claude Code production deployment - install paths, CI integration, and team-scale cost controls
    Installing Claude Code is the easy part. Deploying it across a team in production is the part most guides skip.

    Most of the published guidance on installing Claude Code stops at “run npm install -g and you’re done.” That’s enough for a developer playing on a laptop. It is not enough for a team that wants to run Claude Code in production — in CI, in shared infrastructure, behind a firewall, with cost controls, and with the new Agent SDK billing model that takes effect June 15, 2026.

    This article is the production deployment guide. Triple-sourced against Anthropic’s own Claude Code documentation, the github.com/anthropics/claude-code-action repo, and Anthropic’s announced June 15 billing model. Verified May 15, 2026.

    The three install paths and which to pick

    Per Anthropic’s official Claude Code docs, there are three supported ways to install Claude Code. They produce the same underlying binary but make sense in different operational contexts.

    1. Standalone installer. A native installer for macOS, Windows, and Linux that drops the Claude Code binary in a system path. This is the cleanest install for individual developers — no Node.js required, no npm dependency, predictable upgrade behavior. Use this on workstations where the operator owns the machine.

    2. npm global package. npm install -g @anthropic-ai/claude-code. Requires Node.js 18 or later. Pulls the same native binary as the standalone installer through a per-platform optional dependency, then a postinstall step links it into place. Use this when you already manage developer tools through npm and want one less install path to track. Supported platforms: darwin-arm64, darwin-x64, linux-x64, linux-arm64, linux-x64-musl, linux-arm64-musl, win32-x64, win32-arm64.

    3. Desktop app. A desktop-class application distributed via .dmg on macOS and MSIX/.exe on Windows. This is the path most teams will deploy to non-developer staff, and it integrates with enterprise device management tools like Jamf, Kandji, and standard Windows MSIX deployment.

    If you are deploying across a team larger than a handful of developers, mix-and-match: standalone or npm for engineering workstations, desktop for everyone else.

    The npm install gotchas worth knowing before you ship

    Two things in Anthropic’s official docs are worth flagging because they will save you from a whole class of bug reports later:

    Don’t use sudo. Anthropic’s setup documentation explicitly warns against sudo npm install -g @anthropic-ai/claude-code. It can lead to permission issues and security risks. If you need a global install on a machine where your user can’t write to the npm prefix, fix the npm prefix first (point it at a user-writable directory) rather than escalating with sudo.

    Don’t use npm update for upgrades. The right command per Anthropic’s docs is npm install -g @anthropic-ai/claude-code@latest. npm update -g respects the original semver range and may not move you to the newest release. This trips up CI pipelines that try to keep Claude Code current via update; they will sit on a stale version forever.

    Production deployment considerations

    The single most important piece of context for a production Claude Code deployment in 2026: the billing model changes on June 15, 2026.

    Before June 15, Claude Code interactive sessions and claude -p non-interactive runs both draw from your normal subscription usage limits. Starting June 15, interactive Claude Code keeps using subscription limits as before, but claude -p and direct Agent SDK usage move to a separate per-user monthly Agent SDK credit pool ($20 Pro, $100 Max 5x, $200 Max 20x, $20-$100 Team, up to $200 Enterprise).

    For teams running Claude Code in CI, in cron jobs, in shell scripts, in GitHub Actions workflows — anywhere the trigger is automated rather than a human — this changes the economics. Plan capacity against the new credit pool, not the legacy shared subscription pool. Full breakdown in our Agent SDK Dual-Bucket Billing article.

    Three other production considerations:

    Network configuration. Behind a corporate firewall, you’ll need to allowlist Anthropic’s API endpoints, configure proxy settings, and potentially route through an LLM gateway. Anthropic’s network configuration documentation covers the specifics.

    Enterprise device deployment. Per Anthropic’s official docs, the desktop app distributes through standard enterprise tools — Jamf and Kandji on macOS via the .dmg installer, MSIX or .exe on Windows. If your IT team already has a deployment workflow for similar developer tools, Claude Code drops into it without anything special.

    API key management. If your team uses Claude Developer Platform API keys instead of (or alongside) subscription auth, manage them like any other production secret — vault them, rotate them, scope them per environment, never check them into source control. This becomes more important after June 15 because API key usage is the recommended path for sustained shared automation, and unintended sprawl gets expensive.

    Claude Code GitHub Actions: the team multiplier

    The fastest way to get team-level value from Claude Code is the official GitHub Actions integration. From Anthropic’s documentation and the public github.com/anthropics/claude-code-action repository:

    The setup command. The cleanest install is to run /install-github-app from inside Claude Code in your terminal. It walks you through installing the GitHub App, configuring the required secrets, and wiring the workflow file. Manual setup also works — copy the workflow YAML from Anthropic’s docs and add the ANTHROPIC_API_KEY secret to your repository settings — but the install command saves the assembly time.

    The interaction model. Once installed, mentioning @claude in a pull request comment or an issue triggers Claude Code to act on the context. Claude can analyze the diff, create new PRs, implement features described in an issue, fix reported bugs, and respond to follow-up comments — all while adhering to whatever conventions you’ve documented in your repository’s CLAUDE.md file.

    Three use cases worth separating clearly.

    • Automated code review. Claude Code reads the diff on every pull request and posts inline comments flagging potential issues, suggesting improvements, or checking for convention violations. Highest signal-to-noise when path-filtered to relevant code only.
    • Issue-to-PR automation. Tag @claude on a well-described issue and Claude Code opens a PR implementing it. Best for small, well-scoped changes; less useful for architectural work.
    • On-demand assistance. Reviewers tag @claude mid-PR to ask questions, request explanations, or get a second opinion before merging. The most defensible use case because it keeps a human in the decision loop.

    Pick the use case that matches your team’s actual bottleneck. Running all three at once on every PR is the fastest way to burn through your usage budget without proportionate value.

    Cost expectations at team scale

    Independent reports as of May 2026 put Claude Code GitHub Actions PR-review costs at roughly $15-25 per month for a team of 3-5 developers doing 10-15 PRs per week, billed against a Claude Developer Platform API key at Sonnet rates. That figure should be treated as directional — your actual cost depends on PR size, how many tools you’ve configured, model selection, and how aggressive your path-filtering is.

    Two cost controls that materially change the math:

    • Path filters. Trigger Claude Code only on file changes that actually need review. Skipping documentation, generated files, and lockfile-only PRs cuts the bill substantially.
    • Concurrency limits. GitHub Actions concurrency settings prevent Claude Code from running multiple instances against the same branch at once. Without this, force-pushes and rapid-fire updates can stack runs.

    If you are running Claude Code on every PR across an active team, you will hit Anthropic API rate limits. The mitigation is path filters, concurrency limits, and batching — none of which are speculative; they are documented patterns.

    The CLAUDE.md file is not optional

    Whatever your install path and whatever your use case, the single piece of project context that has the largest effect on Claude Code’s output is the CLAUDE.md file at the root of your repository. This is where you tell Claude Code what your project is, what conventions to follow, what tools are available, what to avoid, and what success looks like.

    If you skip it, Claude Code is reasoning from the files alone — useful but generic. If you write it, Claude Code is reasoning with your team’s context and your specific codebase rules. The difference shows up in the first ten minutes of use.

    A practical CLAUDE.md for a production team usually includes: the project’s purpose and stack, naming conventions and folder structure, testing requirements, lint and format rules, deployment considerations, what kinds of changes need human review, and explicit prohibitions (“never commit migrations directly to main”, “always update X when you change Y”). Keep it concise — verbose CLAUDE.md files inflate every per-turn token cost across the team.

    What to actually do this week

    1. Pick your install path per role (standalone or npm for developers, desktop for everyone else).
    2. Install Claude Code on one workstation and run through the quickstart end-to-end before rolling to the team.
    3. Write a real CLAUDE.md for your primary repository before anyone uses Claude Code on it. Even a 100-line version is far better than nothing.
    4. If you’re running anything automated, read the Agent SDK billing change before June 15.
    5. If you want team-level value, install the GitHub Actions integration — but pick one use case (code review, issue-to-PR, or on-demand help), not all three at once.
    6. Set path filters and concurrency limits in your workflow before you put Claude Code on every PR.

    Frequently Asked Questions

    What’s the difference between the npm install and the standalone installer?

    None functionally — both install the same native binary. The npm path is convenient if you already manage developer tools through npm. The standalone installer is cleaner if you don’t want a Node.js dependency. Both upgrade through their own mechanism.

    Why does Anthropic say not to use sudo with npm install?

    Per Anthropic’s official setup documentation, sudo with global npm installs can create permission issues and security risks. The recommended fix is to configure your npm prefix to a user-writable directory, then install without elevated privileges.

    How do I upgrade Claude Code installed via npm?

    Run npm install -g @anthropic-ai/claude-code@latest. Don’t use npm update -g — it respects the original semver range and may not move you to the latest release. This is documented in Anthropic’s setup guide.

    Does Claude Code work in CI/CD pipelines?

    Yes. The official GitHub Actions integration is the recommended path for GitHub-based workflows. For other CI systems (GitLab, CircleCI, Jenkins), the underlying tool is the Claude Agent SDK plus claude -p. Both move to the new Agent SDK monthly credit pool on June 15, 2026.

    How much does Claude Code GitHub Actions cost for a team?

    Independent reports as of May 2026 estimate $15-25/month for a 3-5 developer team running PR review on 10-15 PRs/week at Sonnet rates with a Claude Developer Platform API key. Actual cost varies with PR size, tool configuration, model selection, and path filtering aggressiveness.

    What’s the single biggest mistake teams make installing Claude Code?

    Skipping the CLAUDE.md file. Without it, Claude Code reasons generically against your codebase. With even a basic CLAUDE.md describing your conventions and constraints, output quality improves substantially across every interaction. It is the highest-leverage 30-minute setup task.

    Related Reading

    How we sourced this

    Sources reviewed May 15, 2026:

    • Anthropic Claude Code documentation: Set up Claude Code and Advanced setup at code.claude.com (primary source for install paths, npm gotchas, enterprise deployment patterns)
    • Anthropic Claude Code GitHub Actions documentation at code.claude.com/docs/en/github-actions (primary source for the GitHub Actions integration setup and use cases)
    • github.com/anthropics/claude-code-action public repository (primary source for the action’s interaction model)
    • Anthropic Help Center: Use the Claude Agent SDK with your Claude plan (primary source for the June 15, 2026 billing change)
    • Independent cost analyses (KissAPI, OpenHelm, Steve Kinney) for the team-scale cost estimates — Tier 2 confirming sources

    Cost figures and version specifics in this article are accurate as of May 15, 2026. Anthropic ships Claude Code updates frequently; the install paths and CLI commands are stable, but pricing and rate limits are the most likely figures to need re-verification.

  • My AI Operating Stack: Notion, Claude & Google Cloud

    My AI Operating Stack: Notion, Claude & Google Cloud

    Last refreshed: May 15, 2026

    A surveyor's tripod with copper, porcelain, and steel legs planted on rocky ground at sunrise above the clouds — representing the Notion, Claude, and Google Cloud three-legged stack
    The three-legged stack — Notion, Claude, Google Cloud — is what’s actually holding up the operation.

    I run a portfolio of businesses — restoration companies, content properties, creative ventures, a software platform, a comedy site, a few things I haven’t decided what to do with yet — on three legs. Notion. Claude. Google Cloud. That’s it. Everything else either fits inside that triangle or it doesn’t last in my stack.

    This article is the doctrine. Not “here’s a list of tools I like.” The actual operating philosophy of why this specific three-piece architecture is what holds the work up, where each leg’s job ends, and what I learned the hard way about which tools belong on the floor instead of the table.

    If you’re trying to decide what your own AI-driven operating stack should look like, what follows is what I’d tell you over coffee.

    Why three legs and not two, four, or twelve

    I tried twelve. I tried four. I lived for a while with two. Three is what’s left after everything else either failed in production, got absorbed into one of the three legs, or became overhead that didn’t pay for itself.

    The reason it’s not two is that you need a place where state lives, a place where reasoning happens, and a place where heavy compute runs. If you collapse two of those into one tool, the tool has to be excellent at both jobs and almost nothing is. If you keep them separate, each tool gets to be excellent at its actual job.

    The reason it’s not four is that every additional leg multiplies the surface area of what can break, what needs to be monitored, what needs to be paid for, what needs to be learned by every new person you bring in. Four legs sounds like it would be more stable but it isn’t. It’s more rigid. Three legs sit flat on uneven ground.

    The reason it’s not twelve is that I tried that and the cognitive cost of remembering which tool did which job was higher than the work the tools were supposed to be saving.

    Notion is the system of record

    State lives in Notion. That’s the rule. If a piece of information needs to exist tomorrow, it goes in Notion first.

    That includes the things you’d expect — clients, projects, content pipelines, scheduled tasks, the Promotion Ledger that governs which autonomous behaviors are running at what tier — and a lot of things you might not. Meeting notes go in Notion. Random ideas at 11pm go in Notion. The reasons I made a particular architectural decision six months ago go in Notion. Anything I might want Claude to read later goes in Notion.

    The reason this leg has to be Notion specifically — and not, say, a folder of markdown files, or a Google Doc, or Airtable — is structured queryability paired with human-readable rendering. Notion databases let me describe my business in shapes (a content piece is a row, a project is a row, a contact is a row) while keeping every row a real document I can read and write to like a normal page. That dual nature is rare. Most systems force you to pick between structured and prose. Notion lets the same object be both.

    The May 13, 2026 Notion Developer Platform launch made this leg even stronger. Workers, database sync, and the External Agents API mean the system of record can now do active things on its own and host outside agents (including Claude) as native collaborators. Notion stopped being a passive document store and started being a programmable control plane. That’s a big deal for this architecture and I wrote about it in my piece on the platform launch.

    Claude is the reasoning layer

    Claude does the thinking. That’s the rule on the second leg.

    Anywhere I would otherwise have to write something from scratch, decide between options, summarize a long document, generate code, audit content, or do any task that requires a brain rather than just a database query, Claude is the first thing I reach for. The work happens in Claude. The result lands in Notion.

    I want to be specific about why Claude and not “an LLM” generically. I have used the others. I have used GPT in production. I have used Gemini in production. They all work. Claude is what I picked, and the reasons aren’t religious.

    First, the writing is recognizable. Claude’s voice has a calibration to it that the others don’t quite have for the kind of work I’m doing — long-form content, operator-voice editorial, technical explainers. I can edit a Claude draft to feel like me much faster than I can edit the others.

    Second, the agentic behavior is the most stable across long sessions. Claude Managed Agents and Claude Code in particular are willing to think for a long time without losing the plot. For multi-step work that involves reading a lot of context, holding it, and acting on it across many turns, the difference is real.

    Third, the tooling around Claude — Claude Code, Cowork, the Agent SDK, MCP — is the most operator-friendly of the bunch right now. The other models will catch up. As of May 2026, Claude is the best fit for how I actually work.

    Fourth, and this matters more than people give it credit for: I am willing to bet on Anthropic the company. I am betting my operations on the leg that bears my reasoning load. Whose roadmap I’m comfortable with, whose values I find legible, whose engineering culture I trust to keep shipping the thing without breaking it underneath me — that’s a real input to the decision, not a soft preference.

    Google Cloud is the substrate

    The third leg is the heavy one. Google Cloud is where the things live that have to be reliable in a way that Notion can’t be and Claude isn’t supposed to be.

    The 27 WordPress sites I manage all live on GCP infrastructure. The knowledge-cluster-vm hosts five interconnected sites. The proxy that lets Claude talk safely to WordPress sites runs on Cloud Run. The cron jobs that fire scheduled work, the Python services that handle image pipelines, the AI Media Architect that runs autonomously — all on GCP. Anything that involves real compute, regulated data, behind-a-firewall execution, or sustained reliability lives on the third leg.

    The reason this leg has to be a real cloud and not just a laptop or a Hetzner box is that I run autonomous behaviors. Tier C autonomous behaviors run unattended, which means the substrate they run on has to be more reliable than I am. GCP gives me that. It’s also where Anthropic’s Claude is available through Vertex AI, which means there’s a path where the entire stack can run inside one cloud’s perimeter when that becomes operationally necessary.

    I picked GCP specifically over AWS or Azure for a few reasons. Vertex AI’s first-party Claude access matters to me. The GCP control surface is the one I’m fastest in. Cost-wise it’s been competitive for the workloads I run. None of those are universal — your third leg might be AWS, or Azure, or a hybrid with on-premise hardware. The doctrine isn’t “use GCP.” The doctrine is “have a real substrate that can carry the heavy work.”

    How the three legs hold each other up

    The thing that makes this an actual stack and not just three tools is the load each leg puts on the others.

    Notion holds Claude’s memory. Claude doesn’t have persistent memory across sessions in any deep way — what it remembers is what’s in the prompt and what it’s allowed to look up. Notion is where I put the things I want Claude to know tomorrow. Project briefs, brand voice docs, the Promotion Ledger, client context, my preferences. When Claude starts a session it looks at Notion. When the session is done, what mattered gets written back to Notion. The memory leg is Notion. Without it, Claude is amnesiac and has to be re-briefed every time.

    Claude does the work that Notion can’t and that GCP isn’t shaped for. Notion can hold structured data and run light automation through Workers and database sync. Notion can’t write a 2,000-word article in your voice. GCP can run a reliable cron job and host whatever you want on Cloud Run. GCP isn’t going to read your existing client notes and propose a follow-up email. The reasoning leg is Claude. Without it, you have a database and a server and no one to think.

    GCP holds the things that have to keep running when nobody is watching. Notion can’t host a WordPress site. Claude can’t run a cron job by itself. The compute leg is GCP. Without it, the autonomous behaviors that make this a system instead of a tool collection have nowhere to live.

    Each leg fails gracefully into the others. If Notion is down, GCP keeps the live workloads running and Claude can still do work in a session. If Claude is down, Notion still holds state and GCP still runs the autonomous infrastructure. If GCP is down, the websites are unreachable but the planning surface (Notion) and the reasoning surface (Claude) still let me figure out what to do about it. No single failure takes the whole operation down.

    What I tried that didn’t make the cut

    For honesty’s sake, here’s what I had in earlier versions of the stack that’s no longer there:

    Zapier and Make for orchestration. They worked. They cost real money at the volumes I was running. The May 13 Notion Developer Platform launch absorbed most of what I was using them for into native Notion functionality. What’s left I do with Cloud Run jobs.

    Multiple LLMs for “best tool for the job.” I went through a phase of routing different work to different models. The cognitive overhead of “which one for this task” was higher than any quality gain from the routing. I picked Claude and stayed.

    Custom CRMs and project management tools. Tried several. None of them did the job better than a well-structured set of Notion databases with the right templates and views. The CRM is in Notion now. The project management is in Notion. The pipeline tracking is in Notion.

    A second cloud “for redundancy.” Sounded smart, was actually overhead. If GCP goes down catastrophically I have bigger problems than my stack. Single-cloud is fine for a small operator portfolio.

    Local AI models for cost savings. The math didn’t work for me. I have a powerful workstation that can run open models, but the time cost of running them, debugging them, and maintaining them outweighed the API savings. Claude through the subscription and through Vertex when I need it is what I pay for now.

    Why this matters beyond my own operation

    I write about this not because anyone is required to copy it but because the shape of the answer — three legs, one for state, one for reasoning, one for compute — generalizes.

    If you’re a solo operator, a small agency, a content business, a service business with operational complexity, this shape works. Your specific tool choices for each leg will be different. Maybe your state lives in Airtable instead of Notion. Maybe your reasoning leg is GPT or Gemini. Maybe your substrate is AWS or Vercel or your own bare metal. The three-leg architecture survives the substitutions.

    What doesn’t survive substitutions is collapsing the legs. Putting state and reasoning in the same tool (anyone who has tried to use ChatGPT as their CRM knows what I mean) doesn’t work. Putting reasoning and compute in the same tool means you’re either compromising on reasoning to keep compute simple or compromising on compute to keep reasoning fluid. The separation is where the strength is.

    Where the stack is going next

    Three things I’m watching:

    Notion’s platform maturation. The May 13 launch is version 1 of what Notion as a programmable platform looks like. If Workers and database sync continue to grow into real automation surface, more of what I do on GCP could move to Notion. I don’t expect the heavy stuff to migrate, but the lightweight glue is moving in that direction.

    Claude’s agentic capabilities. Claude Managed Agents and the Agent SDK are getting better fast. Some of what I currently script in Python on Cloud Run will move into Claude-native agentic loops as the agents become more capable of long-running, reliable work without supervision.

    The fortress pattern on GCP. The ability to run Claude inside a private GCP perimeter via Vertex AI is becoming more important as I take on regulated industry work. The substrate leg is staying GCP precisely because of this — the perimeter matters.

    The stack will evolve. The three-leg shape probably won’t.

    Frequently Asked Questions

    Why Notion and not Airtable, Coda, or Obsidian?

    Notion’s combination of structured databases and human-readable page rendering is what makes it work as both a database and a knowledge base for Claude. Airtable is more powerful as a database but worse as a document. Coda is similar in spirit but smaller community and tooling around it. Obsidian is excellent for personal knowledge but doesn’t have the multi-user, structured-database surface I need to run businesses on.

    Why Claude and not GPT or Gemini?

    Voice quality for the kind of writing I do, agentic stability across long sessions, operator-friendly tooling (Claude Code, Cowork, MCP), and Anthropic’s roadmap and culture being legible to me. The other models work; Claude is what I picked.

    Why Google Cloud and not AWS?

    Vertex AI’s first-party Claude access, GCP’s control surface fitting how I work, competitive cost on my specific workloads. AWS would also work. The doctrine is “have a real substrate,” not “use GCP specifically.”

    Can a small operator afford this stack?

    Yes. Notion is $10/seat. Claude Pro is $20/month, Max is $100-$200. GCP costs scale with what you actually run — my 27-site infrastructure runs in the low three figures monthly. Total monthly stack cost for a solo operator running this architecture is well under what most people pay for a single SaaS tool that does only one of these jobs.

    What if one of the legs goes away or pivots badly?

    Each leg is replaceable. The shape of the stack matters more than the specific brands. If Notion pivots away from being useful, the state leg moves somewhere else. If Anthropic pivots, the reasoning leg moves. If I leave GCP, the substrate leg moves. The architecture is durable; the specific tool choices are not load-bearing in the way the architecture is.

    How long did it take to settle on this shape?

    Roughly two years of trying things. I write the doctrine now because I want my own next iteration to start from this shape rather than rebuilding it from scratch. If you want to skip those two years, this is the shortcut.

    Related Reading

  • Notion Developer Platform: What Changes for Claude

    Notion Developer Platform: What Changes for Claude

    Last refreshed: May 15, 2026

    The Three-Legged Stack: Claude, Notion, GCP - walnut stool with copper, porcelain, and steel legs representing the Tygart Media AI operating stack
    Notion’s May 13 Developer Platform launch reshapes how the Notion + Claude + GCP stack fits together.

    On May 13, 2026, Notion shipped what is, structurally, the biggest change to how Notion fits into an AI-driven operating stack since the original Notion AI launch. Version 3.5 — the Notion Developer Platform — turns Notion from a workspace that you operate into a platform that other agents can operate inside. Claude is one of the launch partners.

    This article is written from inside the practice of running a business on a three-legged stool of Notion, Claude, and Google Cloud. The Developer Platform launch matters to that stool in specific ways, and most of the day-one coverage is missing them. The goal here is to pin down what shipped, what it actually changes for an operator who already runs Claude against Notion, and where the seams are between this platform and the way most of us were already wiring things together.

    What Notion actually shipped on May 13, 2026

    From Notion’s own release notes for version 3.5 (verified May 15, 2026), the Developer Platform comprises four meaningfully distinct pieces:

    Workers. A cloud-based runtime that runs custom code inside Notion’s infrastructure. Workers is how you take a Notion-resident workflow and bind real compute to it — running on a schedule, reacting to a database trigger, fanning work out to other systems — without standing up your own infrastructure for the runtime.

    Database sync. Notion databases can now pull live data from any API-enabled external source. The thing that used to require a Zapier or Make.com bridge becomes a property of the database itself.

    External Agents API. The piece that matters most for Claude users: an outside AI agent can appear and operate inside the Notion workspace as a first-class collaborator. Claude is one of the launch partners, alongside Cursor, Codex, and Decagon.

    Notion CLI. A command-line tool through which both developers and agents interact with the platform. Available across all plan tiers.

    The packaging detail worth noting: Workers and the Developer Platform deployment surface are limited to Business and Enterprise plans, but the External Agents API and the CLI are available on all tiers. The whole platform is free to use through August 11, 2026.

    The shift in framing, in operator terms

    Before May 13, the standard pattern for getting Claude to work with Notion looked like this: install a Notion MCP server, point Claude Code at it, and use Claude as the active driver that reads from and writes to Notion through tool calls. Notion was the database, Claude was the agent, MCP was the wire.

    After May 13, the relationship can flip. The External Agents API lets Claude appear inside Notion — not as an external tool you switch to, but as a collaborator your team can assign work to from the same task board where you assign work to humans. The wire is no longer “Claude reaches into Notion when called.” It’s “Notion can hand work to Claude the same way it can hand work to a person.”

    For an operator running a second-brain architecture, that’s a meaningful change. It moves Claude from a tool you invoke into a participant your system operates against. Both modes are still available — MCP wiring still works fine — but the External Agents API opens a different set of patterns where the system of record stays in Notion and Claude becomes one of several agents that the system orchestrates.

    Where this fits in the three-legged stool

    For anyone running Notion + Claude + Google Cloud as the operating stack of a small business or solo operator setup, the Developer Platform launch reinforces something the architecture was already pointing at: Notion is the system of record, Claude is the reasoning layer, GCP is the compute and data substrate. The May 13 launch makes that division of labor more legible.

    • Notion as system of record — Workers and database sync make Notion an active control plane, not just a passive document store. State lives here. Workflows initiate here.
    • Claude as reasoning layer — The External Agents API gives Claude a formal role inside Notion’s task management, planning, and review loops. Claude does the thinking; Notion holds the result.
    • GCP as compute substrate — Anything Workers can’t do (long-running automation, heavy compute, custom data pipelines, things that need to live behind a firewall), Cloud Run and Compute Engine still handle. Workers doesn’t replace GCP for the operations that need real horsepower; it extends Notion into the lightweight automation gap that previously required a Zapier-class bridge.

    The leg that grows the most from this launch is Notion. It picks up native automation and native AI-agent orchestration in one shipment. The leg that doesn’t change is Google Cloud — GCP is still where the heavyweight workloads live, the per-site WordPress fortresses run, and the custom Python and Node services that hold the operational glue together.

    The Claude-specific implications

    Anthropic’s customer page on Notion (verified May 15, 2026) confirms that Notion has integrated Claude Managed Agents — the version of Claude designed for long-running sessions with persistent memory and high-quality multi-turn outputs. Notion has also made Claude Opus available inside Notion Agent for the first time as part of the broader integration. The framing from Anthropic’s side: Notion is a design partner that helped shape Claude Code’s early development, and the External Agents API is the formal extension of that partnership into the Notion product surface.

    Practically, three things change for someone who already runs Claude against Notion:

    1. The MCP wiring is no longer the only path. If you’ve been using a Notion MCP server to give Claude Code read-write access to your workspace, that pattern still works and still has its place — particularly for developer workflows where Claude is doing the driving. But for operational workflows where Notion should drive and Claude should respond, the External Agents API is now the more natural fit.

    2. Multi-agent orchestration becomes a first-class concept. When Notion can address Claude, Cursor, Codex, and Decagon as discrete agents, the question stops being “which AI tool do I use” and becomes “which agent gets which task.” That’s a richer surface for actually distributing work across capabilities — Cursor for IDE-bound coding, Claude for long-form reasoning and writing, Decagon for customer-facing workflows. The orchestration sits in Notion.

    3. The persistent-memory pattern gets cleaner. The “Notion as Claude’s memory” architecture that we and others have been building with MCP wiring is now a supported, native pattern rather than a clever workaround. The structured pages, databases, and templates that hold what Claude needs to remember between sessions can now be addressed through a sanctioned API rather than reverse-engineered through tool calls.

    What we’d actually rebuild now

    If we were starting our second-brain architecture from scratch on May 15, 2026, knowing what shipped on May 13, the build order would be different than what we have today:

    • Database structures stay in Notion — same as before. The systems of record (clients, projects, content pipelines, scheduled tasks, the Promotion Ledger) all live in Notion databases.
    • Sync replaces a meaningful chunk of Zapier/Make — anywhere we currently bridge Notion to an external API for read or for write, native database sync becomes the first thing to try before reaching for a third-party automation tool.
    • Workers handles light recurring automation — the kind of thing we currently run as a Cloud Run cron job, where the trigger and state both live in Notion. Workers is closer to the data and easier to reason about for operators who don’t want to context-switch out of Notion.
    • External Agents API for Claude orchestration — Claude assignments come from inside Notion’s task surfaces. The Promotion Ledger, the editorial calendar, the client deliverable boards all become places where Claude can be assigned the same way a teammate is assigned.
    • GCP holds everything that’s heavyweight or sensitive — WordPress fortresses, custom data pipelines, anything HIPAA/regulated, the AI Media Architect run on Cloud Run, the knowledge-cluster-vm. None of this moves. Notion’s platform doesn’t compete here.

    The honest part: most of our existing infrastructure is staying. The Developer Platform launch isn’t a “rebuild everything” moment. It’s a “reach for Notion-native first when the workflow naturally lives in Notion anyway” moment. Where we used to glue together MCP servers, Zapier flows, and custom Cloud Run jobs to bridge gaps, the gaps are smaller now.

    The seams worth noticing

    Three things to be honest about:

    Workers is plan-gated. If you’re on a Notion plan below Business, you can use the External Agents API and the CLI but not Workers. The full programmable-platform vision requires the upgrade. For solo operators on Plus or below, this is a real friction point.

    The free-through-August window is a usage signal, not a permanent state. The Developer Platform is free through August 11, 2026. Notion has not yet published post-window pricing. Anyone building production workloads against the platform should plan for the possibility of a usage-based or tier-gated pricing model after that date.

    External Agents is a launch-partner-first model. Claude Code, Cursor, Codex, and Decagon are first-class. Other agents — and there will be other agents — show up later through the API. If your stack depends on an agent that isn’t on the launch partner list, the surface for integrating it is smaller right now than it will be in a few months.

    What to actually do this week

    If you’re running Claude against Notion in any operational capacity:

    1. Read Notion’s official release notes for 3.5 (notion.com/releases/2026-05-13). It’s short and concrete.
    2. Try the Notion CLI on a non-production workspace. The CLI is the lowest-friction way to feel what’s actually changed.
    3. If you have any workflow currently glued together with Zapier/Make where the trigger and state are both in Notion, evaluate whether database sync or Workers replaces it more cleanly.
    4. If you currently invoke Claude through MCP for tasks that would more naturally be assigned to Claude from inside Notion’s task boards, prototype the same workflow through the External Agents API and compare.
    5. Don’t migrate anything you don’t have to. The May 13 launch creates new options, not new mandates.

    Frequently Asked Questions

    What is the Notion Developer Platform?

    It’s the May 13, 2026 release (Notion 3.5) that adds Workers (cloud-based runtime), database sync (live data from external APIs), an External Agents API (outside AI agents operating natively inside Notion), and a Notion CLI. It turns Notion from an application you use into a platform you and your agents can build on.

    Is Claude one of the launch partners?

    Yes. Per Notion’s release notes and Anthropic’s customer page on Notion (both verified May 15, 2026), Claude is a launch partner alongside Cursor, Codex, and Decagon. Notion has also integrated Claude Managed Agents and made Claude Opus available inside Notion Agent.

    How is the External Agents API different from connecting Claude through MCP?

    MCP wiring lets Claude reach into Notion through tool calls — Claude is the driver, Notion is the data source. The External Agents API lets Claude appear inside Notion as a collaborator that can be assigned work — Notion is the driver, Claude is one of several agents responding. Both patterns coexist. Pick the one that matches who should be in charge of the workflow.

    What does the Developer Platform cost?

    Free through August 11, 2026, per Notion’s release notes. Workers and the deploy surface are limited to Business and Enterprise plans; the External Agents API and CLI are available across all tiers. Post-window pricing has not been published as of May 15, 2026.

    Does this replace MCP servers?

    No. MCP servers remain useful — particularly for developer workflows where Claude is doing the driving from inside Claude Code, and for cases where you need Claude to talk to multiple systems (not just Notion). The External Agents API adds an alternative pattern for the cases where Notion should hold the workflow and Claude should respond to it.

    Should I move workloads off Google Cloud onto Notion Workers?

    For most things, no. Workers is suited to lightweight, Notion-native automation. Heavy compute, regulated workloads, custom data pipelines, and anything that needs to live behind a firewall still belong on GCP (or your equivalent cloud). The Developer Platform extends what Notion can do natively; it doesn’t replace what cloud infrastructure does.

    Related Reading

    How we sourced this

    Sources reviewed May 15, 2026:

    • Notion official release notes: May 13, 2026 – 3.5: Notion Developer Platform at notion.com/releases/2026-05-13 (primary source for what shipped, pricing window, plan-tier gating)
    • Anthropic customer page on Notion at claude.com/customers/notion (primary source for Claude Managed Agents integration, Opus availability in Notion Agent, design-partner relationship)
    • TechCrunch coverage of the May 13 launch (Tier 2 confirming source for partner agent list and “control room for AI agents” framing)
    • InfoWorld coverage of the Notion Developer Platform launch (Tier 2 confirming source)
    • BetaNews and Dataconomy coverage (additional Tier 2 confirming sources)

    This article will need a refresh after August 11, 2026, when the free-pricing window ends and Notion publishes post-window pricing details. The verified-vs-reported standard from our other May 2026 pieces applies — anything beyond what Notion’s own release notes and Anthropic’s customer page confirm has been clearly distinguished.

  • Claude MCP Token Cost: Stop Burning 18,000 Tokens a Turn

    Claude MCP Token Cost: Stop Burning 18,000 Tokens a Turn

    Last refreshed: May 15, 2026

    If you’ve ever connected a few Model Context Protocol (MCP) servers to Claude Code and watched your usage limit drain faster than the work you actually did would explain, you’re not imagining it. There’s a real, documented, and sometimes substantial token cost to wiring MCP servers into your Claude environment — and most setup guides don’t mention it.

    The short version: each MCP server you connect injects its complete tool schema into the context of every message you send. Multiple servers stack. The total overhead can range from a few thousand tokens for a single server up to roughly 18,000 tokens per turn when you’re running a typical multi-server developer setup. Anthropic’s own engineering team has acknowledged this in a public GitHub issue and shipped optimizations to reduce it.

    This article walks through where the overhead actually comes from, how to measure your own setup, what Anthropic has changed in 2026 to ease the cost, and the concrete steps you can take to keep MCP useful without burning through your token budget.

    What MCP actually is, briefly

    The Model Context Protocol is an open standard created by Anthropic that lets Claude (and other LLMs that adopt the standard) connect to external tools and data sources through a common interface. Instead of writing a custom integration for every API or database you want Claude to access, you point Claude at an MCP server, and the server exposes its capabilities — file access, Slack messages, GitHub repos, database queries — in a format Claude can use.

    It’s a real productivity unlock. It’s also why the token math gets complicated.

    Where the token cost comes from

    When you connect an MCP server to Claude Code (or any MCP-aware client), three things happen on every message:

    1. Tool schema injection. Every tool the server exposes — every name, every description, every parameter definition — is included in the context Claude sees. A Slack MCP server with 10–15 tools typically adds about 2,000 tokens. A GitHub server is heavier. A custom internal-tooling server with verbose descriptions can run 5,000–8,000 tokens on its own.

    2. Tool-use system prompt overhead. Anthropic’s documentation confirms that whenever tools are present in a request, a special system prompt is automatically prepended that teaches the model how to use tools. For Claude 4.x models with tool_choice: auto, that’s an additional 346 tokens per request. The bash tool adds 245. The text editor tool adds 700. The computer-use tool adds 735 plus a 466–499 token system prompt extension.

    3. Stateless re-sending. Each message in a conversation is a fresh API request that includes the full conversation history plus the full tool schema. Claude does not “remember” your tools from the last turn the way a human remembers a colleague’s job description. Every turn pays the schema cost again.

    That’s the math. Now multiply by the number of MCP servers you have connected. A developer running Slack + GitHub + a database connector + an internal custom server can easily land in the 15,000–20,000 tokens-per-turn range — and that’s before you’ve typed your actual question.

    The 18,000-token figure, sourced

    The “up to 18,000 tokens per turn” number comes from a combination of public sources verified May 15, 2026:

    • Anthropic’s own GitHub repo for Claude Code, issue #3406, titled “Built-in tools + MCP descriptions load on first message causing 10–20k token overhead.” Anthropic engineers acknowledged the issue and have shipped progressive optimizations against it.
    • Independent analysis by MindStudio measuring real Claude Code sessions with multiple MCP servers attached.
    • Anthropic’s official Claude Code documentation on cost management explicitly recommends running /mcp to inspect connected servers and disabling unused ones to control token consumption.

    The exact number for your setup will be different. The shape of the problem is the same.

    Why this matters more than it looks

    Claude’s standard context window is 200,000 tokens. Losing 18,000 of those to tool definitions before you start typing represents about 9% of your effective working space. That’s a real ceiling cost — but it’s not the part that hurts most.

    The part that hurts is the cumulative bill. If you’re on a Claude subscription with a usage limit, every turn through Claude Code is paying the full schema cost again. A workflow that takes 30 turns of back-and-forth burns 540,000 tokens worth of tool definitions across that session — even if the tool descriptions never change. On the API at standard Sonnet 4.6 rates, that’s about $1.62 in pure schema overhead per session, before any of the actual work gets billed.

    Multiply by a team of engineers running Claude Code daily, and the overhead becomes the largest single line item in your token spend.

    What Anthropic has changed in 2026

    Anthropic has shipped two meaningful optimizations against MCP token bloat over the past few months:

    Deferred tool loading. In recent Claude Code releases, MCP tool definitions are no longer all loaded into context at the start of a session by default. Tool names enter context, but the full schemas only load when Claude actually invokes a particular tool. This is a substantial improvement for sessions where you have many tools available but only use a few.

    Tool Search. A new built-in search mechanism lets Claude discover relevant MCP tools on demand rather than carrying them all in context. One independent measurement reported a Claude Code MCP context cut of 46.9% — from roughly 51,000 tokens down to 8,500 tokens — by using Tool Search instead of full upfront loading.

    These optimizations help, but they don’t make the overhead zero. The baseline cost of having any MCP server connected at all is real, and you still pay it on every turn even with deferral active.

    How to measure your own MCP token cost

    Two practical methods work for most setups:

    Method 1 — The /mcp command. In Claude Code, run /mcp to see every server currently connected. For each one, check how many tools it exposes. Anthropic’s documentation explicitly recommends this as the first step to controlling MCP costs.

    Method 2 — Token-count delta. Send a single message in Claude Code with no MCP servers connected and note the input token count from the API response. Reconnect your MCP servers one at a time. The delta in input tokens between configurations is the per-turn cost of each server. This is the most precise way to know your own number.

    Anything north of about 8,000 tokens per turn in pure MCP overhead is worth optimizing. North of 15,000 is a flag.

    Concrete steps to control MCP token cost

    • Disable MCP servers you aren’t actively using. The single highest-leverage move. If you connected a server two weeks ago for one experiment and never went back to it, every turn you’ve taken since has been paying for it.
    • Prefer CLI tools over MCP servers when both exist. Anthropic’s own cost-management guidance notes that tools like gh, aws, gcloud, and sentry-cli remain more context-efficient than equivalent MCP servers because they don’t add per-tool listing overhead. Claude can simply invoke them via the bash tool.
    • Use MCP gateways for large server counts. If you genuinely need many tools available, gateway products (Maxim, Milvus-backed setups, others) consolidate tools and surface only relevant ones per query, cutting net overhead substantially.
    • Run a complex CLAUDE.md audit. Long project-level CLAUDE.md files compound the per-turn baseline. Treat CLAUDE.md as an asset that’s expensive to keep verbose.
    • Watch for context compounding. In long Claude Code sessions, conversation history grows alongside the tool schema cost. If you’re running a workflow longer than 20 turns, periodically clear context (/clear) to reset the per-turn cost to baseline.

    Frequently Asked Questions

    Does every MCP server cost 18,000 tokens?

    No. The 18,000-token figure is for a typical multi-server setup with several connected servers and built-in tools active. A single small MCP server (5–10 tools, concise descriptions) might only add 1,500–3,000 tokens. The cost scales with the number of servers and the verbosity of their tool definitions.

    Why does Claude reload the tool definitions every turn?

    The Claude API is stateless. Every message is a fresh API request containing the full conversation history and the full tool schema. The model has no memory between requests, so the schema must be present every time tools could be used. Recent deferred-loading optimizations reduce this for unused tools, but anything Claude actually needs still loads each turn.

    How do I see what’s loaded in my Claude Code environment?

    Run /mcp in Claude Code to list every connected MCP server and its tool count. To check the actual token cost, send a test message and inspect the input token count returned by the API.

    Are CLI tools really cheaper than MCP servers?

    Yes, for tools that have both options. CLI tools accessed via the bash tool only add the bash tool’s 245-token overhead. An equivalent MCP server adds its full tool schema for every tool it exposes. For tools you use frequently, MCP can still be worth it for the structured interface; for tools you use rarely, CLI is more efficient.

    Does this affect Claude on the web (claude.ai) too?

    Web Claude does not use the same MCP server-connection model as Claude Code. The MCP token-overhead pattern primarily affects Claude Code, custom Agent SDK applications, and other developer-facing clients where you wire in MCP servers directly.

    Will this get better in future Claude releases?

    Likely. Anthropic has already shipped deferred tool loading and Tool Search in 2026, both of which materially reduce the per-turn overhead for unused tools. The architectural baseline (tools must be present in context to be invoked) is unlikely to change, but the practical cost should keep dropping as the deferred-loading optimizations mature.

    Related Reading

    How we sourced this

    Sources reviewed May 15, 2026:

    • Anthropic GitHub: anthropics/claude-code issue #3406, “Built-in tools + MCP descriptions load on first message causing 10-20k token overhead” (primary source for the overhead figure and Anthropic acknowledgment)
    • Anthropic Claude Code documentation: Connect Claude Code to tools via MCP and Manage costs effectively (primary source for /mcp command and CLI vs. MCP guidance)
    • Anthropic Pricing Documentation: tool-use system prompt token counts, bash/text-editor/computer-use overheads (primary source for the per-tool fixed costs)
    • Independent analysis: MindStudio (multiple Claude Code MCP measurements), Joe Njenga’s Tool Search 51K→8.5K measurement, Maxim and Scott Spence on optimization patterns (Tier 2 confirming sources)

    Token-cost numbers in this article are accurate as of May 15, 2026. Anthropic is shipping MCP optimizations regularly, so the practical overhead may be lower in your environment than what’s described here.

  • Claude Agent SDK Dual-Bucket Billing: What Changes June 15, 2026 (And Why It Matters)

    Claude Agent SDK Dual-Bucket Billing: What Changes June 15, 2026 (And Why It Matters)

    Last refreshed: June 9, 2026

    If you’ve been running Claude Code’s claude -p command in production, kicking off background jobs through the Claude Agent SDK, or wiring the Agent SDK into a third-party app, the way you pay for that work is about to change.

    Starting June 15, 2026, Anthropic is splitting Claude subscription billing into two separate buckets: one for the things you do interactively (Claude.ai chat, Claude Code in your terminal, Claude Cowork), and a brand-new credit pool that only covers programmatic, autonomous, and SDK-driven work.

    This is a meaningful shift. It’s also one of the most under-explained changes Anthropic has made to subscription pricing this year. If you don’t know about it after June 15, 2026 (now in effect), you can find yourself with stopped automations, surprise overage charges, or both.

    This guide walks through exactly what’s changing, what the credits cover, what they don’t cover, what each plan gets, and how to plan for it — this change is now live.

    Agent SDK Monthly Credit by Plan (June 2026)

    Plan Monthly Price Agent SDK Credit/Month Covers
    Pro $20/month $20 claude -p, SDK jobs, GitHub Actions
    Max 5x $100/month $100 claude -p, SDK jobs, GitHub Actions
    Max 20x $200/month $200 claude -p, SDK jobs, GitHub Actions
    Team Standard $20/seat/mo (annual) or $25/seat/mo (monthly) $20/seat claude -p, SDK jobs, GitHub Actions
    Team Premium $100/seat/mo (annual) $100/seat claude -p, SDK jobs, GitHub Actions
    Enterprise (usage-based) Custom $20/month SDK-driven work only
    Enterprise (seat-based Premium) Custom $200/seat SDK-driven work only

    The short version

    Claude subscription plans (Pro, Max, Team, Enterprise) currently have one shared usage limit. Whether you’re chatting with Claude on the web, using Claude Code in your terminal, or running unattended jobs through the Agent SDK, all of that draws from the same plan-level allowance.

    On June 15, 2026, Anthropic is separating those two modes of use:

    • Bucket 1 — Interactive use: Claude.ai chat, Claude Code in the terminal/IDE, Claude Cowork. Uses your existing subscription usage limits, exactly as before.
    • Bucket 2 — Agent SDK monthly credit: A separate, dollar-denominated credit pool. Funds the Claude Agent SDK, the claude -p non-interactive command, the Claude Code GitHub Actions integration, and any third-party app that authenticates via the Agent SDK.

    The two buckets do not commingle. Agent SDK work cannot draw from your interactive subscription limit, and interactive use cannot draw from your Agent SDK credit. If you exhaust your Agent SDK credit and don’t have extra usage enabled, your background jobs simply stop until the credit refreshes the following month.

    What each plan gets

    Here is the official monthly Agent SDK credit by plan, as published in Anthropic’s Help Center (verified June 9, 2026):

    • Pro: $20/month
    • Max 5x: $100/month
    • Max 20x: $200/month
    • Team — Standard seats: $20/month per seat
    • Team — Premium seats: $100/month per seat
    • Enterprise — usage-based: $20/month
    • Enterprise — seat-based Premium seats: $200/month

    Important detail buried in the announcement: Enterprise seat-based plans on Standard seats are not eligible to claim the Agent SDK credit at all. If you administer one of those plans and have engineers running automation, that’s a gap to plan around.

    What the credit covers (and what it doesn’t)

    Anthropic’s documentation is specific about what counts as Agent SDK use, so this is worth reading carefully.

    Covered by the credit:

    • Claude Agent SDK usage in your own Python or TypeScript projects
    • The claude -p command in Claude Code (non-interactive mode)
    • The Claude Code GitHub Actions integration
    • Third-party apps that authenticate with your Claude subscription through the Agent SDK

    Not covered (these still draw from your normal subscription limits):

    • Interactive Claude Code in your terminal or IDE
    • Claude conversations on web, desktop, or mobile
    • Claude Cowork
    • Other features that draw from extra usage

    The plain-English version: if a human is sitting at the keyboard waiting for the response, that’s interactive use. If a script kicks off the work and the result lands somewhere else later, that’s Agent SDK use.

    How the credit actually works in practice

    Five mechanics matter for budgeting:

    1. Per-user, never pooled. Each eligible user on a Team or Enterprise plan claims their own credit. There is no organization-level pool. Credits cannot be transferred between users, shared, or stockpiled across accounts.

    2. Refreshes monthly with the billing cycle. Whatever you don’t spend in a given month evaporates. Unused credits do not roll over.

    3. One-time opt-in. You claim your credit through your Claude account once. After that initial claim, it refreshes automatically each cycle.

    4. Drains first, before any other source. When an Agent SDK request fires, it pulls from your monthly credit before any other paid usage source kicks in. This is good — it means you actually use what you’ve already paid for.

    5. After the credit, requests either flow to extra usage or stop entirely. When your monthly credit hits zero, additional Agent SDK requests draw from extra usage at standard API rates — but only if you have extra usage enabled. If you haven’t enabled extra usage, your Agent SDK requests stop until the next refresh.

    That last point is the one most likely to bite teams. If you’re running a daily cron job through the Agent SDK and you don’t enable extra usage, the day your credit runs out is the day your automation goes silent — without obvious warning if you’re not watching the credit balance.

    Why Anthropic is doing this

    Anthropic frames this as separating individual experimentation from production automation. From the Help Center documentation: “The Agent SDK monthly credit is sized for individual experimentation and automation. Teams running shared production automation should use the Claude Developer Platform with an API key for predictable pay-as-you-go billing.”

    The translation: a single user’s $20 or $200 of Agent SDK credit was never going to cover a real production workload anyway. Anthropic is making explicit what was already true under the hood — that a subscription was a chat product, and serious unattended automation belongs on the API.

    What this also does, structurally, is protect interactive subscription users from getting their experience degraded by heavy autonomous workloads sharing the same pool. If you’ve ever hit a subscription rate limit during a normal chat session because something else on your account was burning tokens in the background, this change removes that failure mode.

    What you should do after June 15, 2026 (now in effect), 2026

    If you run any unattended Claude work (the most important group):

    Audit every place your subscription is being used by something other than a human at a keyboard. The big four to check:

    • claude -p commands in cron jobs, CI pipelines, or shell scripts
    • Claude Code GitHub Actions workflows
    • Custom Python or TypeScript projects using the Agent SDK
    • Any third-party tool that asks for “Sign in with Claude” — those go through the Agent SDK

    For each one, estimate dollar consumption per day at standard API rates. If the total approaches or exceeds your plan’s Agent SDK monthly credit, you have three options: enable extra usage to allow overage, move that workload to a Claude Developer Platform API key (more predictable for sustained loads), or downsize the workload itself.

    If you administer a Team or Enterprise plan:

    Eligible users on your team will receive an email with claim instructions after June 15, 2026 (now in effect), 2026. You don’t need to take action yourself, but it’s worth communicating internally that the credits are per-user, can’t be pooled, and that any team-wide automation should be on an API key, not on a subscription seat.

    If you’re a solo Pro or Max user who only chats with Claude:

    You probably don’t need to do anything. The split affects you only if you’re running scripts or background jobs. If you’ve never used claude -p or the Agent SDK directly, your interactive usage limits don’t change.

    Frequently Asked Questions

    What happens to my Agent SDK usage on June 14 vs. June 15, 2026?

    Before June 15, Agent SDK and claude -p usage counts against your subscription’s general usage limits. Starting June 15, that same usage no longer touches your subscription limits and instead draws from the new Agent SDK monthly credit pool. Your interactive Claude Code, web chat, and Cowork usage continues to work exactly as before.

    Can I share the Agent SDK credit across my team?

    No. Per Anthropic’s official documentation, “Credits are per-user. Each eligible user on your team claims their own credit. Credits can’t be pooled, transferred, or shared across the organization.” If your team needs shared automation budget, the Claude Developer Platform with an API key is the recommended path.

    Do unused Agent SDK credits roll over?

    No. Unused credits expire at the end of each billing cycle and do not carry into the next month.

    What happens if I run out of Agent SDK credit mid-month?

    If you have extra usage enabled, additional requests flow to extra usage at standard API rates (the same per-token prices listed in Anthropic’s pricing documentation). If extra usage is not enabled, your Agent SDK requests stop until your credit refreshes at the start of the next billing cycle.

    Does this affect Claude API customers using their own API key?

    No. If you authenticate with the Agent SDK using a Claude Developer Platform API key, nothing changes. Pay-as-you-go billing continues, and you do not receive an Agent SDK monthly credit. The credit only applies to subscription-authenticated Agent SDK use.

    Is interactive Claude Code in my terminal still covered by my subscription?

    Yes. Interactive Claude Code (typing commands and getting responses in your terminal or IDE) continues to draw from your subscription usage limits exactly as before. Only the non-interactive claude -p mode and direct Agent SDK calls move to the new credit pool.

    What’s the dollar value of the credit on each plan?

    As of May 15, 2026: Pro $20, Max 5x $100, Max 20x $200, Team Standard $20/seat, Team Premium $100/seat, Enterprise usage-based $20, Enterprise seat-based Premium $200. Enterprise seat-based Standard seats do not receive a credit.

    Related Reading

    How we sourced this

    Every factual claim in this article was triple-checked across the following sources, all reviewed on May 15, 2026:

    • Anthropic Help Center: Use the Claude Agent SDK with your Claude plan (primary source for credit amounts, eligibility, and mechanics)
    • Anthropic Pricing Documentation: docs.claude.com/en/docs/about-claude/pricing (primary source for standard API rates and tool-use pricing)
    • Independent press coverage from The New Stack, The Decoder, and InfoWorld confirming the announcement and its scope

    If you spot a number that’s drifted out of sync with Anthropic’s current published rates, treat the official documentation as authoritative. The pricing surface around Claude is moving quickly in 2026, and we date-stamp specifics so readers know which facts to re-verify.


    Frequently Asked Questions

    What is the Claude Agent SDK dual-bucket billing change?

    Starting June 15, 2026, Anthropic split Claude subscription billing into two buckets. Bucket 1 covers interactive use (claude.ai chat, Claude Code in terminal, Cowork). Bucket 2 is a separate monthly credit pool that covers only programmatic/autonomous work via the Claude Agent SDK, the claude -p command, and GitHub Actions integration.

    What happens if I run out of Agent SDK credit?

    If you exhaust your Agent SDK monthly credit and don’t have extra usage enabled, your background jobs and SDK-driven automations simply stop until the credit refreshes the following month. Interactive Claude use (chat, Claude Code in terminal) is unaffected — it draws from a separate bucket.

    How much Agent SDK credit does each Claude plan include?

    Pro: $20/month. Max 5x: $100/month. Max 20x: $200/month. Team Standard: $20/seat/month. Team Premium: $100/seat/month. Enterprise seat-based Premium: $200/seat/month. The credit is dollar-denominated and depletes at standard API token rates for whichever model your SDK jobs use.

    Does the Agent SDK credit apply to Claude Code in the terminal?

    No. Claude Code used interactively in your terminal or IDE draws from Bucket 1 (your subscription usage limit), not from the Agent SDK credit pool. Only non-interactive, programmatic use via the Agent SDK and claude -p command draws from the Agent SDK credit bucket.

    Can I add more Agent SDK credit if I run out?

    Yes. You can enable extra usage on Pro, Max 5x, Max 20x, and Team plans. Once enabled, SDK jobs that exceed your monthly credit continue at standard API rates with a spending cap you set, rather than stopping entirely.

    Which Claude plans don’t get Agent SDK credit?

    The Free plan receives no Agent SDK credit. Free tier users cannot run programmatic SDK workloads at all — that requires at minimum a Pro subscription at $20/month.

  • Claude Code Pricing 2026: Pro, Max, and API Limits

    Claude Code Pricing 2026: Pro, Max, and API Limits

    Last refreshed: May 15, 2026

    Claude Code pricing has stopped being a clean sticker number and started being a question of which ceiling you hit first. There is a $20 plan, a $100 plan, and a $200 plan — and underneath all three sits a 5-hour rolling window, a weekly active-hours cap added in August 2025, and a per-model multiplier that quietly makes Opus 4.7 the most expensive thing you can do inside the terminal. If you came looking for the right plan, the honest answer is: it depends on whether you are mostly a Sonnet operator or you live in Opus.

    The three subscription tiers, stripped down

    Pro — $20/month. Access to Claude Code in the terminal, web, and desktop, with both Sonnet 4.6 and Opus 4.7 available. The practical envelope is about 44,000 tokens per 5-hour window and roughly 40–80 weekly active hours on Sonnet, depending on session concurrency. This is the plan for someone running Claude Code a few hours a day on focused work — refactors, scoped feature builds, debugging passes — not someone leaving an agent running while they eat lunch.

    Max 5x — $100/month. Five times the Pro envelope, plus priority during peak demand. The window allocation lands around 88,000 tokens per 5-hour block. This is the tier where you stop thinking about token budgets during a single working day and start thinking about them across a whole week. Picked correctly, it is the cheapest way to use Claude Code as your primary IDE companion without flipping over to API billing.

    Max 20x — $200/month. Twenty times Pro — about 220,000 tokens per window — which translates to roughly 480 Sonnet-hours or about 40 Opus-hours per week before the weekly cap kicks in. Real-world reports from early 2026 had $200/month users watching single Opus prompts eat 10–20% of their daily allocation; Anthropic publicly acknowledged the problem, expanded capacity, and doubled the 5-hour rate limit for Pro and Max accounts. If you are running Claude Code across multiple repos all week and reaching for Opus on the hard problems, this is the tier that stops you from staring at a rate-limit wall.

    The API, as a sanity check

    If you want a sanity check on whether the subscription math works, price the same workload against the API:

    • Claude Haiku 4.5 (claude-haiku-4-5-20251001): $1.00 input / $5.00 output per million tokens
    • Claude Sonnet 4.6 (claude-sonnet-4-6): $3.00 input / $15.00 output per million tokens
    • Claude Opus 4.7 (claude-opus-4-7): $5.00 input / $25.00 output per million tokens

    Prompt caching is the lever almost nobody uses correctly. Cache writes cost 1.25x input price for the 5-minute TTL or 2.0x for the 1-hour TTL, but cache reads cost 0.10x — a 90% discount on every subsequent request that hits the same context. If your .clauderules file, project map, and the file you are editing are all stable for an hour, the bill on a long pairing session can drop by an order of magnitude. The Batch API knocks another 50% off both directions for asynchronous workloads, which is worth knowing if you are running large refactor sweeps.

    One trap on Opus 4.7 specifically: the model uses a new tokenizer that inflates token counts by up to 35% on identical text compared to Opus 4.6. The headline price did not change, but your effective spend per request did — sometimes by nothing, sometimes by a third, depending on the content. If you migrated from Opus 4.6 and your bill went up without your prompt patterns changing, that is the reason.

    How to actually choose

    The cleanest way to pick a plan is to first decide your model mix, then your weekly hours.

    If you are mostly a Sonnet operator — long agentic runs, multi-file edits, codebase Q&A, with Opus only reached for on the architectural questions — Pro at $20 is plausible up to about 5–8 hours of focused use per day, Max 5x covers most full-time individual developers, and Max 20x is overkill unless you are running multiple sessions in parallel.

    If you live in Opus — long-horizon agentic work, hard refactors across many files, anything where you would rather have one good attempt than three Sonnet retries — Pro will frustrate you within two weeks, Max 5x is the realistic floor, and Max 20x is the only tier that gives you a defensible Opus envelope without bouncing over to API billing.

    And if you are running Claude Code across multiple repos all week, leaving agents to grind on tasks while you do other things, Max 20x is the only subscription that holds up — and even then, the weekly cap is real. Use the API for the spillover and you will still come out cheaper than trying to brute-force a smaller plan.

    The number that matters

    One developer’s public report this year: roughly 10 billion tokens consumed across Claude Code over eight months. API metered cost would have exceeded $15,000. The same workload on Max at $100/month for the same window came in around $800 — about 93% cheaper. That is the gap that makes the subscription model worth taking seriously, even when the rate limits feel arbitrary. The $200 tier is not a vanity number; it is the price Anthropic charges to stop being a meaningful constraint on your workflow.

    The right way to read Claude Code pricing in May 2026 is not to ask which plan is cheapest. It is to ask which plan is the cheapest one that disappears — the one that stops appearing in your day. For most full-time developers reaching for Opus regularly, that plan is Max 20x. For everyone else, Max 5x is the first plan that actually gets out of your way.

    📖 Recommended Reading in Claude Code Insider

  • Claude MCP Configuration: 2026 Setup & Token Savings

    Claude MCP Configuration: 2026 Setup & Token Savings

    Last refreshed: May 15, 2026

    If you set up Claude MCP six months ago and have not touched the config since, three things have changed underneath you: the recommended transport, how tools are loaded into context, and how teams share server configs. None of these are cosmetic. If you ignore them, you are leaving tokens, money, and stability on the table.

    This is the working Claude MCP setup I use in May 2026 — what the claude mcp add command actually does, which scope to pick, what the deprecation of SSE means in practice, and where Claude Code still falls short.

    The three-scope mental model

    Every MCP server you wire into Claude Code lives at exactly one of three scopes. Get this wrong and you will either leak credentials into git or wonder why your teammate cannot use the same database the AI just queried.

    • Local (default): the server is available only to you, only inside the current project. Config is written into your project’s entry inside ~/.claude.json. Good for project-specific servers like a dev database or a Sentry project key you do not want other repos to inherit.
    • User: the server is available to you across every project on your machine. Also stored in ~/.claude.json. This is where GitHub, search providers, and personal productivity servers belong.
    • Project: the server is written to a .mcp.json file at the repo root and shared with the whole team via git. Claude Code prompts for approval the first time a teammate opens the project — by design, because anyone who can push to the repo can wire a new server into your environment.

    When the same server is defined in more than one scope, Claude Code resolves it in this order: local beats project beats user beats plugin-provided. This is the part that bites people the most. If you have a “github” entry at user scope and someone adds a different “github” entry at project scope in .mcp.json, the project definition wins for that repo. Run claude mcp list when something behaves strangely.

    The commands you actually need

    The CLI is more useful than the docs make it look. Three commands cover ~90% of real setup work:

    # Add a remote HTTP MCP server at user scope (available everywhere)
claude mcp add --transport http hubspot --scope user https://mcp.hubspot.com/anthropic

# Add a local stdio server scoped only to this project
claude mcp add my-db -s local -- node ./scripts/db-mcp.js

# Share a server with your team via the repo's .mcp.json
claude mcp add my-server -s project -- node server.js

    The short flag is -s, the long is --scope. The -- separator is required for stdio servers because everything after it is treated as the literal command to spawn. Forget it and Claude Code will try to interpret your Node arguments as its own flags.

    SSE is dead. Use Streamable HTTP.

    If your MCP server documentation still tells you to use the sse transport, the documentation is stale. The MCP spec dated 2025-03-26 introduced Streamable HTTP and simultaneously deprecated HTTP+SSE. Through 2026, vendor after vendor has set hard cutoff dates — Atlassian’s Rovo MCP server keeps SSE around until June 30, 2026 and then drops it; Keboola pulled SSE on April 1; Cumulocity’s AI Agent Manager flipped to Streamable HTTP on May 8.

    Why this matters beyond a name change: SSE required Claude Code to hold a persistent connection to a single server replica, which broke horizontal scaling and made every transient network blip a reconnection drama. Streamable HTTP is stateless. Multiple replicas behind a load balancer just work. If you have flaky MCP connections in production, the first thing to check is whether the server is still on SSE.

    For new setups, use --transport http. The older --transport sse still functions but is on the deprecation path.

    Tool Search is the feature you should actually care about

    The single biggest change in how Claude Code uses MCP in 2026 is lazy tool loading via Tool Search. Older MCP clients dumped every tool schema from every connected server into the model’s context window at the start of every conversation. With ten servers wired up that could easily be 20,000+ tokens of overhead before you typed a single character.

    Tool Search inverts this. Claude Code keeps only the server names and short descriptions resident. When a tool is actually needed, it fetches that tool’s full schema on demand. Anthropic’s own documentation says this reduces tool-definition context usage by roughly 95% versus eager-loading clients. In practice that means you can run a serious MCP fleet — GitHub, Sentry, a database, a search provider, your internal API — without quietly burning through your context budget. The Sonnet 4.6 and Opus 4.7 1M-token context window does not save you here, because anything you let crowd the prompt is also being re-read on every turn.

    Companion feature: list_changed notifications. An MCP server can now tell Claude Code “my tool list changed” and Claude Code refreshes capabilities without a disconnect-reconnect dance. If you build your own server, emit this when you swap tool definitions and you save users a restart.

    What it still gets wrong

    Honest take: claude mcp list still does not surface scope information for every entry in a useful way — there is an open issue on the anthropics/claude-code repo asking for it (#8288 if you want to track). Project-scoped servers from .mcp.json have a separate history of not appearing in the list output (#5963) depending on how you opened the project. If you cannot find a server, check both ~/.claude.json and ./.mcp.json directly.

    The other rough edge is the project-approval prompt. The first time you open a repo with a new .mcp.json, Claude Code asks you to approve each project-scoped server. That is the right security default. It is also infuriating in CI or any non-interactive shell, where the prompt blocks the session. The current workaround is to bake the servers in at user scope on build agents so the project-scope approval never fires in CI. A cleaner non-interactive approval flow is the single most-requested fix I see in real teams.

    The setup I would run on a new machine today

    User-scope: GitHub, a code search server, and a single notes/Notion server. Project-scope in each repo’s .mcp.json: whatever database the project owns and whatever observability backend it reports to. Local-scope: anything experimental I am evaluating but do not want my team or my other repos to inherit.

    Pin --transport http on everything remote. Skip Desktop Extensions (.dxt) for anything you want versioned with the codebase — they are a Claude Desktop convenience, not a Claude Code primitive, and they hide the config from your team. Run claude mcp list when something is off and read .mcp.json directly when list is unhelpful.

    That is the whole working model. The pieces that matter — three scopes, Streamable HTTP, Tool Search — fit on a single screen. The pieces that have not caught up yet — list output, non-interactive approvals — are visible in the issue tracker and will move.

    📖 Recommended Reading in Claude Code Insider

  • Claude Code Hooks: Enforce Workflow Rules Automatically

    Claude Code Hooks: Enforce Workflow Rules Automatically

    Last refreshed: May 15, 2026

    You’ve been there. You add a rule to CLAUDE.md — “always run prettier after editing files” — and Claude follows it, most of the time. Then it doesn’t. The formatter doesn’t run, the lint check gets skipped, and you’re back to reviewing diffs manually.

    Hooks fix this. Claude Code hooks are shell commands, HTTP endpoints, or LLM prompts that fire deterministically at specific points in Claude’s agentic loop. Unlike CLAUDE.md instructions, which are advisory, hooks are enforced at the execution layer — Claude cannot skip them.

    As of early 2026, Claude Code ships with 21 lifecycle events across four hook types. This article covers the two that matter most for daily workflow: PreToolUse and PostToolUse.

    How Hooks Work Architecturally

    Claude Code’s agent loop is a continuous cycle: receive input → plan → execute tools → observe results → repeat. Hooks intercept this loop at named checkpoints.

    Every hook is defined in .claude/settings.json under a hooks key. A hook entry has three parts: the lifecycle event name, an optional matcher (a regex against tool names), and the handler definition — either a shell command, an HTTP endpoint, or an LLM prompt.

    {
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Write|Edit",
        "hooks": [
          {
            "type": "command",
            "command": "npx prettier --write "$CLAUDE_TOOL_INPUT_FILE_PATH""
          }
        ]
      }
    ]
  }
}

    That’s it. Every file Claude writes or edits now auto-formats. No CLAUDE.md reminders, no hoping Claude remembers — the formatter runs on every single Write or Edit tool call, period.

    PreToolUse: Enforce Before Claude Acts

    PreToolUse fires before Claude executes any tool. Your hook receives the full tool call — name, inputs, arguments — and can return one of three signals:

    • Exit 0 → allow the tool call to proceed
    • Exit 2 → block the tool call; Claude receives your error message and adjusts
    • Exit 1 → hook error; Claude proceeds but logs the failure

    This makes PreToolUse the right place for guardrails. Here’s a real example: blocking npm in a bun project.

    #!/bin/bash
# .claude/hooks/check-package-manager.sh
# Blocks npm commands in projects that use bun

if echo "$CLAUDE_TOOL_INPUT_COMMAND" | grep -qE "^npm "; then
  echo "Error: This project uses bun, not npm. Use: bun install / bun run / bun add" >&2
  exit 2
fi
exit 0

    Wire it in settings.json:

    {
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": ".claude/hooks/check-package-manager.sh"
          }
        ]
      }
    ]
  }
}

    Now when Claude tries npm install, the hook exits 2, Claude sees the error message, and it switches to bun install without you intervening. The correction happens in the same turn.

    Another production pattern: blocking writes to protected paths.

    #!/bin/bash
# Prevent Claude from modifying migration files already run in production
if echo "$CLAUDE_TOOL_INPUT_FILE_PATH" | grep -qE "db/migrations/"; then
  echo "Error: Migration files are immutable after deployment. Create a new migration instead." >&2
  exit 2
fi
exit 0

    PostToolUse: React After Claude Acts

    PostToolUse fires after a tool completes successfully. It can’t block execution, but it can provide feedback — and it can run any side-effect you need automatically.

    Auto-format every edit:

    {
  "hooks": {
    "PostToolUse": [
      {
        "matcher": "Write|Edit",
        "hooks": [
          {
            "type": "command",
            "command": "npx prettier --write "$CLAUDE_TOOL_INPUT_FILE_PATH" 2>/dev/null || true"
          }
        ]
      }
    ]
  }
}

    Run tests after code changes:

    #!/bin/bash
# Run affected tests after any source file edit
FILE="$CLAUDE_TOOL_INPUT_FILE_PATH"
if echo "$FILE" | grep -qE "\.(ts|js|py)$"; then
  if [ -f "package.json" ]; then
    npx jest --testPathPattern="$(basename ${FILE%.*})" --passWithNoTests 2>&1 | tail -5
  fi
fi

    Desktop notification on task completion:

    {
  "hooks": {
    "Stop": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "osascript -e 'display notification "Claude finished" with title "Claude Code"'"
          }
        ]
      }
    ]
  }
}

    Environment Variables Available to Hooks

    Claude Code exposes context about the triggering tool call through environment variables. The ones you’ll use most:

    Variable Value
    $CLAUDE_TOOL_NAME Name of the tool being called (e.g., Edit, Bash, Write)
    $CLAUDE_TOOL_INPUT_FILE_PATH File path for Edit, Write, Read calls
    $CLAUDE_TOOL_INPUT_COMMAND Shell command for Bash calls
    $CLAUDE_SESSION_ID Current session ID — useful for audit logging
    $CLAUDE_TOOL_RESULT_OUTPUT Output of the tool (PostToolUse only)

    These are injected by Claude Code before your hook runs. You don’t configure them — they’re always there.

    The Model Question: Which Claude Runs Agentic Tasks?

    One practical consideration for hook-heavy workflows: the default model affects how well Claude responds to hook feedback. As of May 2026:

    • claude-opus-4-7 ($5/MTok input, $25/MTok output) — highest agentic coding capability; best at interpreting hook rejection messages and self-correcting without re-asking
    • claude-sonnet-4-6 ($3/MTok input, $15/MTok output) — strong balance of speed and reasoning; handles most hook-corrected flows well
    • claude-haiku-4-5-20251001 ($1/MTok input, $5/MTok output) — fastest; may require more explicit hook messages to course-correct reliably

    For workflows with complex PreToolUse guardrails — especially ones that provide long error messages with corrective instructions — Opus 4.7 handles the feedback loop most reliably. For simpler PostToolUse automation (formatters, notifications), model choice doesn’t matter; the hook runs regardless.

    To configure the model: export ANTHROPIC_MODEL=claude-opus-4-7 before launching Claude Code, or set it in your team’s .env.

    Hooks vs. CLAUDE.md: When to Use Each

    CLAUDE.md is the right place for context, preferences, and guidance — things you want Claude to know about your project. Hooks are the right place for behavior that must happen every time without exception.

    The practical test: if failing to follow the instruction costs you five minutes of manual cleanup, put it in a hook. If it’s a style preference or a reminder about architecture decisions, put it in CLAUDE.md. The two are complementary — you’ll likely end up with both in any mature project setup.

    A team that gets this right builds CLAUDE.md as documentation for Claude and hooks as the CI/CD equivalent for the agentic loop.

    Getting Started

    The fastest path to a working hook setup:

    1. Create .claude/settings.json in your project root if it doesn’t exist
    2. Add a PostToolUse hook wired to your formatter — this is low-risk and immediately valuable
    3. Test it by asking Claude to edit a file; the formatter should run automatically
    4. Add PreToolUse guardrails for any tool calls that have caused problems in the past

    The official hooks reference is at code.claude.com/docs/en/hooks — it covers all 21 lifecycle events, HTTP handler format, and the full JSON output schema for hook responses.

    Hooks are the difference between Claude Code as a powerful suggestion engine and Claude Code as a reliable automation layer. Once you have a PostToolUse formatter running on every edit, going back feels like working without version control.

    📖 Recommended Reading in Claude Code Insider

  • Claude Code for Teams: Configuration & Gitignore Guide

    Claude Code for Teams: Configuration & Gitignore Guide

    Last refreshed: May 15, 2026

    Most teams I see roll out Claude Code by handing every engineer the install command and walking away. Three weeks later, half the repo has personal preferences committed to .claude/settings.json, the other half has a CLAUDE.md that contradicts the actual review process, and someone’s customized subagent is silently making code changes nobody else on the team understands.

    There is a better way, and it lives in the split between three files: CLAUDE.md, .claude/settings.json, and .claude/settings.local.json. Get this split right, and Claude Code becomes a force multiplier for the team. Get it wrong, and you are shipping AI-generated code that nobody owns.

    The Three-File Split

    Here is the rule, no exceptions:

    CLAUDE.md — committed. Project root. Every engineer’s session reads this at startup. Put your architectural decisions, preferred libraries, naming conventions, and a review checklist here. If you would not write it on a whiteboard for a new hire, it does not belong here.

    .claude/settings.json — committed. Team-wide tool permissions, default models, and hooks. This is the file that keeps personal flagship-model enthusiasts from blowing through your team’s budget when claude-sonnet-4-6 would have done the job. If you let everyone default to claude-opus-4-7 for routine refactors, your monthly invoice will tell you about it.

    .claude/settings.local.json — gitignored. Personal preferences, individual MCP server configs, anything that varies by engineer. Add this line to your .gitignore on day one:

    .claude/settings.local.json

    If you do not, someone will commit credentials by Friday. Audit your existing repo right now: git log --all --full-history -- .claude/settings.local.json will surface any history that needs scrubbing.

    The mistake I see most often is teams committing settings.local.json because someone copied a tutorial that did not make the distinction clear. That copy-paste error is the single most common Claude Code rollout failure I have seen this year.

    Shared Subagents Are the Real Win

    Project subagents live in .claude/agents/ and they ship with the repo. This is where teams compound value. A subagent for security review, one for accessibility audits, one for SQL migration safety — defined once, used by every engineer, every PR.

    A subagent definition is a markdown file with YAML frontmatter and a system prompt. When you commit it, every teammate’s claude invocation can call it. The subagent inherits your CLAUDE.md context automatically, so you do not have to redefine the project’s coding standards inside each agent.

    Here is the trap: do not put twelve subagents in there on day one. Start with one. The team’s most painful repeated review task is the right candidate. Whatever takes a long time and pulls in multiple engineers per PR — that is your first subagent. After two weeks of using it, you will know whether the second one is worth defining.

    CLAUDE.md Is a Living Document, Not a Manifesto

    The longest CLAUDE.md files I see are the worst-performing. Engineers do not read 4,000-word context files, and neither does Claude in any useful way — at some point you are paying for tokens that just dilute the signal.

    The CLAUDE.md files that actually shape behavior are usually compact, structured around three things:

    1. What this codebase is and what it is not.
    2. The handful of rules that get a PR rejected — test coverage, naming, error handling, dependency policy.
    3. A pointer to where deeper documentation lives.

    If your CLAUDE.md has a “philosophy” section, delete it. If it has a “history of the project” section, delete it. The file is read every session — make every line earn its tokens.

    CI/CD: Run Claude Code on PRs, Not in Place of Reviewers

    The pattern that works in CI is automated triage, not automated approval. A GitHub Actions workflow that runs Claude Code on every PR to check for things humans miss — missing tests, secrets in logs, public APIs without docstrings — adds value. A workflow that approves and merges PRs adds liability.

    Anthropic’s official GitHub Actions integration handles the auth and runs Claude Code headlessly. The realistic use cases:

    • Comment on PRs with a structured review (not a merge gate).
    • Auto-label PRs based on the diff.
    • Flag suspected regressions before a human reviewer opens the PR.

    Avoid: anything that auto-merges, anything that posts directly to production-facing systems, anything that calls a paid API on every commit to a feature branch. The bill compounds quickly when CI fires Claude on every push to every developer branch. Gate the workflow on PR-target branches only, or on labels.

    Where Claude Code for Teams Loses Today

    The honest list:

    • No native role-based permissions inside a single repo. If you want a junior engineer’s Claude Code to be more restricted than a senior’s, you have to enforce it through settings.json and trust everyone to not edit it. The Enterprise plan adds SSO, SCIM, and audit logs at the workspace level, but inside the repo, Claude Code itself does not differentiate by role.
    • No first-class secret scanning before commits. Hooks can plug this gap, but you have to wire pre-commit yourself.
    • Shared MCP servers are still per-developer auth. A team-shared Linear or Jira MCP, for example, still requires each engineer to authenticate individually.

    The Team plan addresses workspace-level governance through Premium seats, which is the tier that actually unlocks Claude Code for teammates. The Enterprise plan layers on SSO, SCIM, and audit logs. Neither makes the in-repo configuration questions go away — those are still your team’s problem to solve.

    Model Selection Is a Team Decision

    This one matters more than people realize. Default everyone in .claude/settings.json to claude-sonnet-4-6 for day-to-day work, with claude-opus-4-7 available for explicitly hard tasks. The current Anthropic lineup as of this writing — flagship claude-opus-4-7, workhorse claude-sonnet-4-6, fast claude-haiku-4-5-20251001 — is documented at docs.anthropic.com/en/docs/about-claude/models, and the model strings change frequently enough that hard-coding them in scripts has bitten me twice this year. Read that page, do not memorize it.

    A team that defaults to flagship for everything and a team that defaults to workhorse with selective escalation will see meaningfully different invoices for substantially the same productivity. Make the choice consciously.

    The 20-Minute Setup

    If you are rolling Claude Code out to a team next week:

    1. Add .claude/settings.local.json to .gitignore. First commit, today.
    2. Write a focused CLAUDE.md covering review-blocking rules. Ship it short.
    3. Create one subagent in .claude/agents/ for the team’s most painful review task.
    4. Add a single GitHub Actions workflow that runs Claude Code on PRs in comment-only mode.
    5. Schedule a 30-minute team review of the CLAUDE.md every two weeks. Delete more than you add.

    That is it. Everything else is iteration. The teams that succeed with Claude Code treat the configuration as code — versioned, reviewed, and pruned. The teams that fail treat it as a personal productivity tool that happens to be in a shared repo.

    Decide which kind of team you want to be before the third engineer commits.

    📖 Recommended Reading in Claude Code Insider