Borrowing it
Nothing to install: this file belongs to stevesimpson418/gmail-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/stevesimpson418/gmail-mcp-server/main/CLAUDE.mdgit clone --depth 1 https://github.com/stevesimpson418/gmail-mcp-serverWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/stevesimpson418/gmail-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/stevesimpson418/gmail-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/stevesimpson418/gmail-mcp-server/claude-md.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00916 | $0.00916 |
| Opus 5 | $0.00458 | $0.00458 |
| Sonnet 5 | $0.00183 | $0.00183 |
| Haiku 4.5 | $0.00092 | $0.00092 |
Grade A, and why
gmail-mcp-server CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md — Project Intelligence
Project Overview
Gmail MCP server built with FastMCP. Provides Claude with native tool-level access to Gmail via OAuth2. Runs locally via stdio transport — all tokens and credentials stay on the user's machine.
Tech Stack
- Language: Python 3.14+
- Package manager: uv (never use pip directly)
- MCP framework: FastMCP 2.0+
- Google APIs: google-api-python-client, google-auth-oauthlib
- Linting/formatting: Ruff (config in ruff.toml)
- Testing: pytest + pytest-cov
- Git hooks: Lefthook (ruff, markdownlint, shellcheck, shfmt, commitlint)
- CI: GitHub Actions (lint + test matrix)
Project Structure
src/gmail_mcp/ # Source code (src layout)
server.py # Entry point — FastMCP init + tool registration
tools.py # MCP tool definitions (register_gmail_tools)
client.py # Gmail API client wrapper
auth.py # OAuth2 authentication flow
exceptions.py # Custom exception classes
tests/ # Pytest test suite
conftest.py # Shared fixtures (mock service, sample messages)
test_auth.py # OAuth authentication tests
test_client.py # Gmail client tests
test_tools.py # Tool registration tests
credentials/ # OAuth credentials (gitignored)
Key Commands
uv sync --dev # Install all deps
uv run pytest -v # Run tests
uv run pytest --cov=gmail_mcp --cov-report=term-missing # Coverage
uv run ruff check src/ tests/ # Lint
uv run ruff format src/ tests/ # Format
lefthook install # Install git hooks
Conventions
- Commits: Conventional Commits format —
type(scope): description - Line length: 100 characters
- Quotes: Double quotes (enforced by ruff)
- Imports: Sorted by isort via ruff, first-party package declared in ruff.toml
- Tests: Mirror source structure, use fixtures in conftest.py
- Entry point:
server.py:main()— registered as console script in pyproject.toml
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 83 lines · 916 tokens per session scan A b0c158643c2f
gmail-mcp-server CLAUDE.md is an instructions file published in the GitHub repository stevesimpson418/gmail-mcp-server (1 stars, last pushed 1mo ago), licensed MIT. It adds 916 tokens to every session, about $0.0046 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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