What is wweb-mcp CLAUDE.md?

Repository guidance for working on wweb-mcp, a Node.js and TypeScript application that connects WhatsApp Web to AI tools through MCP, a standard for connecting software to AI models. It documents how to build, test, lint, and run the application.

Building and testing the WhatsApp API server or MCP server, running development mode, and applying the project's linting and formatting checks.

It gives an AI coding agent the project context and commands needed to make changes consistently and check whether they work.

How pnizer/wweb-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to pnizer/wweb-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.

Copy the file

curl -O https://raw.githubusercontent.com/pnizer/wweb-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/pnizer/wweb-mcp

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/pnizer/wweb-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/pnizer/wweb-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/pnizer/wweb-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/pnizer/wweb-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/pnizer/wweb-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/pnizer/wweb-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,221 This file is loaded in full into every session.

When invoked 1,221 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.01221	$0.01221
Opus 5.5	$0.00488	$0.00488
Sonnet 5.5	$0.00244	$0.00244
Haiku 4.5	$0.00122	$0.00122

Measured 2mo ago against content hash 6e5753700ab8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

wweb-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.

CLAUDE.md · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 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

WhatsApp Web MCP is a Node.js/TypeScript application that bridges WhatsApp Web with AI models through the Model Context Protocol (MCP). It provides two main deployment modes:

WhatsApp API Server (--mode whatsapp-api) - Standalone REST API server
MCP Server (--mode mcp) - Direct MCP protocol implementation with two sub-modes:
- standalone - Direct WhatsApp Web client connection
- api - Connects to a WhatsApp API server

Development Commands

Essential Commands

# Build the project
npm run build

# Run tests
npm test
npm run test:watch      # Watch mode for development
npm run test:coverage   # Generate coverage report

# Linting and formatting
npm run lint
npm run lint:fix        # Auto-fix linting issues
npm run format          # Format with Prettier
npm run validate        # Run lint + test together

Running the Application

# Development mode with auto-reload
npm run dev

# Production mode
npm run build && npm start

# Run specific modes
npx . --mode whatsapp-api --api-port 3001
npx . --mode mcp --mcp-mode standalone --transport sse --sse-port 3002

Architecture

Core Components

main.ts - Application entry point with CLI argument parsing and server initialization
whatsapp-service.ts - Core business logic for WhatsApp interactions using whatsapp-web.js
whatsapp-api-client.ts - HTTP client for connecting to WhatsApp API server
mcp-server.ts - MCP protocol implementation with tools and resources
api.ts - Express REST API router
whatsapp-client.ts - WhatsApp Web client factory and configuration

Key Design Patterns

Service Layer Pattern - WhatsAppService abstracts WhatsApp operations
Factory Pattern - createWhatsAppClient and createMcpServer for component creation
Adapter Pattern - WhatsAppApiClient adapts REST API to service interface
Configuration Object Pattern - WhatsAppConfig and McpConfig for dependency injection

Read the full file on GitHub · 136 lines

Changes

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 · 136 lines · 1,221 tokens per session scan A 6e5753700ab8

Subscribe to this mod's changes

wweb-mcp CLAUDE.md is an instructions file published in the GitHub repository pnizer/wweb-mcp (46 stars, last pushed 1y ago), licensed MIT. It adds 1,221 tokens to every session, about $0.0049 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 2026-08-30.

mcp whatsapp

wweb-mcp CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
wweb-mcp CLAUDE.mdpnizer/wweb-mcp	Instructions file	46	1y ago	MIT	A	1,221	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,649	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	1,907	GitHub Copilot

wweb-mcp: Instructions file for Claude Code