Borrowing it
Nothing to install: this file belongs to ishaan-skyacres/gmail-multi-mcp. 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/ishaan-skyacres/gmail-multi-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/ishaan-skyacres/gmail-multi-mcpWrote 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/ishaan-skyacres/gmail-multi-mcp/claude-md)<a href="https://agentmods.dev/instructions/ishaan-skyacres/gmail-multi-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/ishaan-skyacres/gmail-multi-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/ishaan-skyacres/gmail-multi-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/ishaan-skyacres/gmail-multi-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.01822 | $0.01822 |
| Opus 5 | $0.00911 | $0.00911 |
| Sonnet 5 | $0.00364 | $0.00364 |
| Haiku 4.5 | $0.00182 | $0.00182 |
Grade A, and why
gmail-multi-mcp 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 8d 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 — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
This is a Gmail MCP (Model Context Protocol) Server built in TypeScript. It provides a local MCP server that integrates with Gmail using OAuth 2.0 authentication, allowing Claude to interact with Gmail through secure API calls.
Key Dependencies
@modelcontextprotocol/sdk: Core MCP framework for building serversgoogleapis: Google's official Node.js client library for Gmail API@google-cloud/local-auth: Google's OAuth 2.0 client for desktop applicationscommander: CLI framework for the account management tool (argument mode)@clack/prompts: Interactive terminal prompts with select menus, spinners, and styled outputpicocolors: Lightweight terminal color libraryzod: Schema validation for tool parametersnodemailer: RFC 822 email construction with attachment supportmime-types: MIME type detection for attachments
Development Commands
# Build both MCP server and CLI (optional - Bun runs TS natively)
bun run build
# Build CLI only
bun run build:cli
# Development mode with hot reload
bun run dev
# Run CLI in interactive mode (no args = arrow-key menu)
bun src/cli.ts
# Run CLI in argument mode (Commander.js)
bun src/cli.ts list
bun src/cli.ts add [email protected]
bun src/cli.ts default
bun src/cli.ts reauth [email protected]
# Test the MCP server with inspector
bun run inspect
# Type-check without emitting
bun run typecheck
# Run tests
bun test
Architecture
The project follows a modular architecture:
- Entry Point:
src/index.ts- Main MCP server setup and tool definitions - CLI:
src/cli.ts- Dual-mode CLI: interactive (no args) or Commander.js (with args) - Interactive CLI:
src/interactive.ts- Arrow-key navigable menu using @clack/prompts - Gmail Client:
src/gmail-client.ts- Gmail API wrapper (send, search, read, modify, delete, batch ops, attachments) - Account Manager:
src/account-manager.ts- Multi-account credential storage and switching - Email Utils:
src/email-utils.ts- MIME encoding, email validation, path security, Nodemailer integration - Label Manager:
src/label-manager.ts- CRUD operations for Gmail labels - Filter Manager:
src/filter-manager.ts- Gmail filter CRUD and pre-built templates - Authentication:
src/auth.ts- OAuth 2.0 credential management - Types:
src/types.ts- TypeScript interfaces and type definitions
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.
- 8d ago First seen · 188 lines · 1,822 tokens per session scan A d50e11d25028
gmail-multi-mcp CLAUDE.md is an instructions file published in the GitHub repository ishaan-skyacres/gmail-multi-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 1,822 tokens to every session, about $0.0091 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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