Wamcp

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🤖 What is WA MCP?

WA MCP is a WhatsApp MCP server built with TypeScript that gives AI agents full access to WhatsApp through the Model Context Protocol. It supports both Baileys (WhatsApp Web) and Meta Cloud API as dual-channel backends, deployable with Docker in a single command.

Your agent connects once and auto-discovers 63 tools, 10 resources, and 12 real-time events — zero configuration, zero REST wrappers, zero glue code.

Your AI Agent ←→ MCP Protocol ←→ WA MCP ←→ WhatsApp

Instead of writing HTTP clients, parsing webhook payloads, and mapping endpoints to tools manually — your agent just connects and goes. Works out of the box with Claude, Google ADK, LangChain, and any MCP-compatible AI agent framework.

💡 MCP (Model Context Protocol) is the open standard for connecting AI agents to tools and data. WA MCP speaks MCP natively via Streamable HTTP and stdio transports.

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🚀 Quick Start

One command with Docker

docker compose up

That's it. WA MCP + Redis, ready on http://localhost:3000/mcp.

Or run locally

# Prerequisites: Node.js >= 22, Redis running
npm install
cp .env.example .env

# Development (stdio transport)
npm run dev

# Production (HTTP transport)
npm run build && npm start

Connect your agent

from google.adk.tools.mcp_tool import McpToolset

tools = McpToolset(url="http://localhost:3000/mcp")

# Agent auto-discovers 63 WhatsApp tools
# wa_create_instance, wa_send_text, wa_send_image, ...

from langchain_mcp import McpToolkit

toolkit = McpToolkit(server_url="http://localhost:3000/mcp")
tools = toolkit.get_tools()

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "whatsapp": {
      "command": "node",
      "args": ["path/to/wa-mcp/dist/index.js"],
      "env": {
        "WA_TRANSPORT": "stdio",
        "WA_REDIS_URL": "redis://localhost:6379"
      }
    }
  }
}

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✨ Features

	Feature	Description
🔌	MCP-native	Streamable HTTP + stdio transports. No REST, no webhooks.
📱	Dual-channel	Baileys (WhatsApp Web) + Meta Cloud API — same interface.
🔄	Multi-instance	Run 1–50 WhatsApp numbers from a single server.
📨	Full messaging	Text, images, video, audio, documents, polls, reactions, replies, forwards, edits, deletes, view-once.
👥	Groups	Create, manage members, promote/demote admins, settings, invite links, join requests, ephemeral messages.
👤	Contacts & Profile	Number check, block/unblock, business profiles, privacy, status updates.
📡	Real-time events	12 notification types via SSE: messages, typing, groups, calls, connection status.
⚡	Rate limiting	BullMQ queues prevent WhatsApp bans (20 msg/min Baileys, 80 msg/min Cloud).
🔁	Auto-reconnect	Automatic reconnection with exponential backoff.
🗃️	Persistent	SQLite storage for sessions, messages, contacts, groups.
🐳	Single container	docker compose up — only Redis as external dependency.

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🛠️ Tools

WA MCP exposes 63 tools across 9 domains. All tools use the wa_ prefix.

Tool	Description
wa_create_instance	Create a new WhatsApp connection
wa_connect_instance	Connect (generates QR code)
wa_disconnect_instance	Gracefully disconnect
wa_delete_instance	Permanently remove instance
wa_restart_instance	Disconnect + reconnect
wa_get_qr_code	Get QR as base64 (Baileys)
wa_get_pairing_code	Get pairing code (Baileys)
wa_set_cloud_credentials	Set Cloud API token

Tool	Description
wa_send_text	Send text message
wa_send_image	Send image with caption
wa_send_video	Send video with caption
wa_send_audio	Send audio / voice note
wa_send_document	Send file / document
wa_send_location	Send GPS location
wa_send_contact	Send vCard contact
wa_send_poll	Create a poll
wa_send_reaction	React with emoji
wa_send_link_preview	Send URL with preview
wa_forward_message	Forward a message
wa_edit_message	Edit sent message
wa_delete_message	Delete message
wa_pin_message	Pin a message
wa_send_view_once	Send view-once media
wa_send_presence	Show typing / recording
wa_mark_read	Mark messages as read

Tool	Description
wa_get_messages	Get chat message history
wa_archive_chat	Archive / unarchive
wa_pin_chat	Pin / unpin chat
wa_mute_chat	Mute / unmute
wa_delete_chat	Delete chat
wa_clear_chat	Clear chat history

Tool	Description
wa_create_group	Create group
wa_group_add_participants	Add members
wa_group_remove_participants	Remove members
wa_group_promote	Promote to admin
wa_group_demote	Demote from admin
wa_group_update_subject	Change group name
wa_group_update_description	Change description
wa_group_update_settings	Change settings
wa_group_leave	Leave group
wa_group_get_invite_code	Get invite link
wa_group_revoke_invite	Revoke invite link
wa_group_join	Join via invite code
wa_group_toggle_ephemeral	Toggle disappearing messages
wa_group_handle_request	Approve / reject join request

Tool	Description
wa_search_contact	Search contacts by name or phone
wa_check_number_exists	Check if number is on WhatsApp
wa_block_contact	Block contact
wa_unblock_contact	Unblock contact
wa_get_business_profile	Get business profile

Tool	Description
wa_update_profile_picture	Set profile picture
wa_remove_profile_picture	Remove profile picture
wa_update_profile_name	Change display name
wa_update_profile_status	Change status text
wa_update_privacy	Update privacy settings

Tool	Description
wa_send_text_status	Post text status
wa_send_image_status	Post image status
wa_send_video_status	Post video status

Tool	Description
wa_newsletter_follow	Follow a newsletter
wa_newsletter_unfollow	Unfollow a newsletter
wa_newsletter_send	Send to newsletter

Tool	Description
wa_reject_call	Reject incoming call

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📖 Resources

Resources expose read-only WhatsApp state via whatsapp:// URIs:

URI	Description
whatsapp://instances	List all instances
whatsapp://instances/{id}	Instance details + queue stats
whatsapp://instances/{id}/contacts	All contacts
whatsapp://instances/{id}/chats	Active conversations
whatsapp://instances/{id}/groups	All groups
whatsapp://instances/{id}/groups/{gid}	Group metadata
whatsapp://instances/{id}/messages/{chatId}	Message history
whatsapp://instances/{id}/profile	Own profile
whatsapp://instances/{id}/privacy	Privacy settings
whatsapp://instances/{id}/blocklist	Blocked contacts

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📡 Real-time Notifications

Events are pushed to agents via SSE (Server-Sent Events):

Event	Trigger
whatsapp/message.received	New incoming message
whatsapp/message.updated	Status change (sent → delivered → read)
whatsapp/message.deleted	Message deleted
whatsapp/message.reaction	Emoji reaction added/removed
whatsapp/message.edited	Message edited
whatsapp/presence.updated	Typing / recording / online
whatsapp/chat.updated	Chat metadata changed
whatsapp/group.updated	Group info changed
whatsapp/group.participants_changed	Member add/remove/promote/demote
whatsapp/contact.updated	Contact info changed
whatsapp/connection.changed	Instance status change (includes QR as base64)
whatsapp/call.received	Incoming call

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🏗️ Architecture

┌─────────────────────────────────────────────┐
│              AI Agent Runtime               │
│    (Google ADK, Claude, LangChain, ...)     │
└──────────────────┬──────────────────────────┘
                   │  MCP Streamable HTTP
┌──────────────────▼──────────────────────────┐
│              WA MCP Server                  │
│                                             │
│  ┌────────────────────────────────────────┐ │
│  │  Layer 1 — MCP Transport (HTTP/stdio) │ │
│  ├────────────────────────────────────────┤ │
│  │  Layer 2 — MCP Core                   │ │
│  │  63 Tools │ 10 Resources │ 12 Events  │ │
│  ├────────────────────────────────────────┤ │
│  │  Layer 3 — Services                   │ │
│  │  Instance Manager │ Queue │ Dedup     │ │
│  ├────────────────────────────────────────┤ │
│  │  Layer 4 — Channel Abstraction        │ │
│  │  ┌──────────────┐ ┌────────────────┐  │ │
│  │  │   Baileys    │ │   Cloud API    │  │ │
│  │  │  (WebSocket) │ │    (HTTPS)     │  │ │
│  │  └──────────────┘ └────────────────┘  │ │
│  └────────────────────────────────────────┘ │
│       SQLite (Drizzle)    BullMQ (Redis)    │
└─────────────────────────────────────────────┘
                   │
                   ▼  WebSocket / HTTPS
          WhatsApp Servers

Dual-Channel Design

	Baileys	Cloud API
Protocol	WhatsApp Web (WebSocket)	Meta Official (HTTPS)
Auth	QR Code / Pairing Code	Access Token
Cost	Free	Per-conversation pricing
Compliance	Unofficial	Meta-approved
Best for	Dev, testing, low volume	Production, enterprise

Both backends implement the same ChannelAdapter interface. Your agent doesn't know or care which one is active — the tools work identically.

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⚙️ Configuration

Copy .env.example to .env and configure:

Variable	Default	Description
WA_TRANSPORT	http	http (Streamable HTTP) or stdio
WA_MCP_API_KEY	—	Bearer token auth. Unset = no auth (dev)
WA_MCP_PORT	3000	HTTP server port
WA_REDIS_URL	redis://localhost:6379	Redis for BullMQ queues
WA_LOG_LEVEL	info	debug | info | warn | error
WA_BAILEYS_RATE_LIMIT	20	Messages/min per Baileys instance
WA_CLOUD_RATE_LIMIT	80	Messages/min per Cloud API instance
WA_MESSAGE_RETENTION_DAYS	30	Auto-delete old messages
WA_AUTO_RECONNECT	true	Auto-reconnect on disconnect
WA_MEDIA_CACHE_MAX_MB	500	Media cache size limit
WA_CLOUD_WEBHOOK_SECRET	—	Meta webhook verification
WA_CLOUD_WEBHOOK_PORT	3001	Webhook receiver port
WA_VERSION_CHECK	true	Daily WhatsApp Web version check

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🐳 Docker

Production

docker compose up -d

Services:

• wa-mcp — The MCP server on port 3000
• redis — BullMQ backend with AOF persistence

Health Check

curl http://localhost:3000/health

{
  "status": "ok",
  "uptime": 3600,
  "instances": { "total": 3, "connected": 2, "disconnected": 1 },
  "version": "1.0.0"
}

Resource Requirements

Instances	RAM	CPU	Disk
1–5	256 MB	0.5 vCPU	1 GB
5–20	512 MB	1 vCPU	5 GB
20–50	1 GB	2 vCPU	10 GB

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📁 Project Structure

src/
├── index.ts                     # Entry point (HTTP/stdio)
├── constants.ts                 # Defaults and limits
├── server/mcp.ts                # MCP server setup
├── tools/                       # 🔧 63 MCP tools (9 files)
├── resources/                   # 📖 10 MCP resources (8 files)
├── notifications/events.ts      # 📡 12 event types
├── channels/
│   ├── channel.interface.ts     # ChannelAdapter contract
│   ├── baileys/                 # Baileys implementation
│   └── cloud-api/               # Cloud API implementation
├── services/
│   ├── instance-manager.ts      # Instance lifecycle
│   ├── message-queue.ts         # BullMQ rate limiting
│   ├── dedup.ts                 # Message deduplication
│   └── media.ts                 # Media handling
├── db/
│   ├── schema.ts                # Drizzle table definitions
│   └── client.ts                # SQLite connection
├── schemas/                     # Zod validation (9 files)
└── types/                       # TypeScript definitions

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🗺️ Roadmap

• Phase 1 — Foundation: Baileys adapter, text messaging, QR auth, instance management
• Phase 2 — Full messaging: all media types, dedup, reactions, edits, forwards
• Phase 3 — Groups, contacts, profile, status/stories, newsletters
• Phase 4 — Cloud API adapter: dual-channel unified interface
• Phase 5 — Hardening: error recovery, CI/CD, tests, docs, v1.0 release
• Phase 6 — Baileys v7 upgrade, LID support, contact sync, message persistence

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🤝 Contributing

Contributions are welcome! Here's how the codebase is organized:

1. One file per domain — tools, resources, schemas, and channels each have domain-specific files
2. Zod schemas for everything — all tool inputs are validated with strict Zod schemas in src/schemas/
3. Both adapters — new features should be implemented in Baileys and stubbed in Cloud API
4. Layered architecture — tools → services → channels. No cross-layer imports.
5. Structured logging — use Pino, never console.log

# Development
npm run dev          # Start with stdio transport
npm run build        # Type-check + compile
npx tsc --noEmit     # Type-check only

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📄 License

MIT — do whatever you want.

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