WhatsApp MCP Extended

An extended Model Context Protocol (MCP) server for WhatsApp with a toolset-gated, agent-facing surface for messaging, search, media, group management, webhooks, presence, and more.

Built on AdamRussak/whatsapp-mcp (webhooks, containers) which forked lharries/whatsapp-mcp (original). Extended with reactions, message editing, polls, group management, presence, newsletters, and more.

What's New (vs Original)

Architecture

┌─────────────────────┐     ┌─────────────────────┐     ┌─────────────────────┐
│   whatsapp-bridge   │     │   whatsapp-mcp      │     │   whatsapp-web-ui   │
│   (Go + whatsmeow)  │◄────│   (Python + MCP)    │     │   (HTML/JS SPA)     │
│   Port: 8080        │     │   Port: 8081        │     │   Port: 8090        │
└─────────────────────┘     └─────────────────────┘     └─────────────────────┘
         │                           │
         ▼                           ▼
    ┌─────────────────────────────────────┐
    │           SQLite (store/)           │
    │  messages.db │ whatsapp.db          │
    └─────────────────────────────────────┘

Quick Start

Docker (Recommended)

git clone https://github.com/felixisaac/whatsapp-mcp-extended
cd whatsapp-mcp-extended

docker network create n8n_n8n_traefik_network
docker-compose up -d

# Scan QR code to authenticate
docker-compose logs -f whatsapp-bridge

Claude Desktop / Cursor Integration

Add to your MCP config (claude_desktop_config.json or Cursor settings):

{
  "mcpServers": {
    "whatsapp": {
      "command": "uv",
      "args": ["run", "--directory", "/path/to/whatsapp-mcp-extended/whatsapp-mcp-server", "python", "main.py"]
    }
  }
}

MCP Tools

Version 0.3.0 exposes the full curated MCP surface by default for compatibility. Users who want a leaner agent context can opt into smaller toolsets.

Default toolsets:

WHATSAPP_MCP_TOOLSETS=all

Lean recommended toolsets:

WHATSAPP_MCP_TOOLSETS=core,send,media

Toolsets:

You can also expose individual tools with WHATSAPP_MCP_TOOLS=manage_group,delete_message.

Breaking change in 0.2.0: older narrow tools are no longer exposed to the agent. Use the merged replacements below.

Migration:

Messaging

Chats & Messages

Contacts

Groups

Presence & Profile

Newsletters (Channels)

API Design Philosophy

Response data prioritizes complete context with minimal interpretation. See METADATA_PHILOSOPHY.md for:

• Why we include raw data instead of pre-computed signals
• How we reduce token waste for consuming LLMs
• Response structure examples (Messages, Chats, Contacts)
• Design rules: raw facts, countable metrics, exclude nulls

TL;DR: Get all contact info in one response instead of repeated queries. LLM infers tone, urgency, relationships from raw data + metrics.

Webhook System

Real-time HTTP webhooks for incoming messages with:

• Triggers: all, chat_jid, sender, keyword, media_type
• Matching: exact, contains, regex
• Security: HMAC-SHA256 signatures
• Retry: Exponential backoff

Access the web UI at http://localhost:8090

Development

Manual Setup

# Bridge (Go 1.25+)
cd whatsapp-bridge && go run main.go

# MCP Server (Python 3.11+)
cd whatsapp-mcp-server && uv sync && uv run python main.py

# Web UI
cd whatsapp-web-ui && npm install && npm run dev

Pre-build Checks

cd whatsapp-mcp-server
uv run python check.py  # Catches errors before docker build

Updating whatsmeow

When you see Client outdated (405) errors:

cd whatsapp-bridge
go get -u go.mau.fi/whatsmeow@latest
go mod tidy
docker-compose build whatsapp-bridge
docker-compose up -d whatsapp-bridge

Ports

Configuration

Environment variables for the bridge (set in .env or docker-compose.yaml):

Quick Commands

After running setup.ps1 once, use the Makefile for day-to-day operations:

make status          # check connection state (connected, needs_pairing, jid)
make pair PHONE=+60123456789   # pair via 8-digit phone code — no QR scan needed
make pairing-status  # check pairing code progress
make reconnect       # force reconnect (no re-pairing)
make logs            # tail bridge logs
make sync-venv       # re-sync Python venv (fix missing module errors)
make open-ui         # open web UI in browser (QR scan, webhooks, contacts)

Session Reliability

Session lifetime rules (WhatsApp-enforced, cannot be changed):

• Primary phone must connect to WhatsApp at least every 14 days
• The bridge companion device must be active at least every 30 days
• WebSocket idle disconnects after ~30 min (auto-reconnects, no re-pairing needed)

What causes permanent logout (requires re-scanning QR):

• Phone offline >14 days
• Manual unlink from phone (Settings → Linked Devices)
• WhatsApp detects suspicious activity / protocol fingerprinting
• WhatsApp app update that forces re-authentication

Account risk: This is a third-party bridge using an unofficial API. Use a dedicated non-personal number. WhatsApp has been aggressively detecting and banning automation tools since 2025. For business-critical use, the WhatsApp Business API is the only compliant path.

If the bridge goes unhealthy (needs re-pairing):

make status          # check: needs_pairing=true means re-pair required
make pair PHONE=+60123456789   # preferred: 8-digit code, no QR scan
# or: open http://127.0.0.1:8090 and scan QR

You can also configure a webhook to receive logged_out events so you're alerted immediately when the session is revoked.

Troubleshooting

Bridge needs re-pairing after restart

The bridge stores credentials in store/whatsapp.db. If that file exists but the bridge still shows QR, WhatsApp revoked the session server-side (check your phone → Settings → Linked Devices). Re-pair using make pair PHONE=+60... or open http://127.0.0.1:8090.

Messages Not Delivering

If API returns success but messages show single checkmark:

docker-compose restart whatsapp-bridge
docker-compose logs --tail=10 whatsapp-bridge
# Should see: "✓ Connected to WhatsApp!"

QR Code Issues

# Option 1: phone number code (no QR scan needed)
make pair PHONE=+60123456789

# Option 2: scan QR via web UI
open http://127.0.0.1:8090

# Option 3: terminal QR
docker-compose logs -f whatsapp-bridge

MCP server fails to start (missing module)

make sync-venv   # re-runs uv sync in whatsapp-mcp-server/

Check bridge health

curl http://127.0.0.1:8180/api/health
# connected: true/false
# needs_pairing: true means QR/code scan required (not just a reconnect)
# disconnected_for: how long it's been offline

Credits

Fork chain:

• lharries/whatsapp-mcp - Original MCP server (12 tools)
• AdamRussak/whatsapp-mcp - Added webhooks, container split, webhook UI
• This repo - Added reactions, edit/delete, groups, polls, presence, newsletters, and a curated MCP tool surface

Libraries:

• whatsmeow - Go WhatsApp Web API
• FastMCP - Python MCP SDK

Community Acknowledgements

Several forks independently solved real problems and their ideas have been incorporated into this repo. Credit where it's due:

If you've forked this repo and built something useful, open a PR or issue — good ideas deserve to flow upstream.

License

MIT License - see LICENSE file.