Borrowing it
Nothing to install: this file belongs to eddmann/whatsapp-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/eddmann/whatsapp-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/eddmann/whatsapp-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/eddmann/whatsapp-mcp/claude-md)<a href="https://agentmods.dev/instructions/eddmann/whatsapp-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/eddmann/whatsapp-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/eddmann/whatsapp-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/eddmann/whatsapp-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 | $0.02608 | $0.02608 |
| Opus 5.5 | $0.01043 | $0.01043 |
| Sonnet 5.5 | $0.00522 | $0.00522 |
| Haiku 4.5 | $0.00261 | $0.00261 |
Grade A, and why
whatsapp-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 2mo 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 — 260 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.
Overview
WhatsApp MCP is a Go-based Model Context Protocol (MCP) server that connects to WhatsApp via whatsmeow, persists messages/chats to SQLite with FTS5, and exposes MCP tools over stdio for AI assistants like Claude/Cursor.
Build Commands
Standard Build
make build
Builds with CGO enabled and SQLite FTS5 support to bin/whatsapp-mcp. CGO is required for go-sqlite3.
Build and Run
make run
Builds and executes the binary. On first run, displays a QR code for WhatsApp pairing.
Clean
make clean
Removes the compiled binary.
Format
make format
Formats Go source code using go fmt.
Alternative Build (without Makefile)
CGO_ENABLED=1 go build -tags "sqlite_fts5" -o bin/whatsapp-mcp ./cmd/whatsapp-mcp
Architecture
Core Components
cmd/whatsapp-mcp/main.go
- Entry point: initializes store, WhatsApp client, services, and MCP server
- Registers 7 MCP tools covering chats, messages, search, messaging, media, and status
- Handles graceful shutdown (SIGINT/SIGTERM) to disconnect WhatsApp and close DBs
- Runs WhatsApp connection in background goroutine with QR authentication
- Serves MCP over stdio using mark3labs/mcp-go
Tools registered:
- Chat management:
list_chats - Message operations:
list_messages,search_messages(with date filters),catch_up(intelligent activity summary) - Messaging:
send_message(unified tool for text, media, or both with fuzzy name matching and reply/threading) - Media:
download_media - Status:
get_connection_status
internal/wa/client.go
- Wraps whatsmeow.Client with store integration
- Provides core WhatsApp client initialization and handler registration
internal/wa/sync.go
- Event handlers:
handleMessagepersists incoming messages,handleHistorySyncbackfills history - Processes WhatsApp events and syncs to local database
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.
- 2mo ago First seen · 260 lines · 2,608 tokens per session scan A 92c69ef52f58
whatsapp-mcp CLAUDE.md is an instructions file published in the GitHub repository eddmann/whatsapp-mcp (7 stars, last pushed 11mo ago), licensed MIT. It adds 2,608 tokens to every session, about $0.0104 per session on Opus 5.5. 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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AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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