WhatsApp MCP Server

🎯 What is This?

A Model Context Protocol (MCP) server that bridges WhatsApp and AI assistants like Claude. It exposes your WhatsApp messages through standardized MCP tools, prompts, and resources - allowing AI to read, search, and send messages on your behalf.

The Vision: Let AI handle your WhatsApp conversations intelligently, with full context and natural language understanding.

You: "Summarize what João said about the budget meeting"
AI:  *searches all your chats* → "João mentioned in the Tech Team group..."

You: "Reply to Maria's last message and schedule lunch"
AI:  *reads context, sends reply* → "Sent! I've proposed Thursday at noon"

✨ Features

Core Capabilities

• 📱 Full WhatsApp Integration - Connect to WhatsApp Web using your existing account
• 💾 Local-First Storage - All messages stored in SQLite, synced in real-time
• 🔍 Powerful Search - Pattern matching, cross-chat queries, sender filtering
• ⏱️ Timezone Support - Messages displayed in your local timezone
• 📥 On-Demand Loading - Fetch older messages from WhatsApp servers as needed
• 🔐 Secure by Design - API key authentication, local data storage, HTTPS ready

MCP Features

This server implements the full MCP specification with:

• 7 Tools for WhatsApp operations
• 4 Prompts for common workflows
• 4 Resources for interactive guides
• Server Instructions for optimal AI interactions

Tools

Prompts

Pre-built workflows that guide AI assistants:

• search_person_messages - Find ALL messages from someone across all chats
• get_context_about_person - Comprehensive analysis of someone's messages
• analyze_conversation - Summarize recent chat activity
• search_keyword - Find specific topics across conversations

Resources

Interactive documentation embedded in the MCP server:

• Cross-Chat Search Guide - Master advanced search workflows
• Workflow Guide - Common operations and best practices
• JID Format Guide - Understanding WhatsApp identifiers
• Search Patterns Guide - Wildcards and pattern matching

🏗️ Architecture

graph TB
    subgraph "AI Client"
        A[AI Assistant <br/> e.g., Claude Web]
    end

    subgraph "WhatsApp MCP Server"
        B[MCP HTTP Server :8080]
        C[MCP Layer]
        D[WhatsApp Client]
        E[(SQLite Database)]

        B -->|/mcp endpoint| C
        B -->|/health| B

        C -->|Tools| C1[list_chats<br/>get_chat_messages<br/>search_messages<br/>find_chat<br/>send_message<br/>load_more_messages<br/>get_my_info<br/>check_numbers]
        C -->|Prompts| C2[search_person_messages<br/>get_context_about_person<br/>analyze_conversation<br/>search_keyword]
        C -->|Resources| C3[Workflow Guides<br/>Search Patterns<br/>JID Format]

        C1 -.->|read/write| E
        C1 -.->|send| D

        D -->|sync messages| E
        D <-->|WhatsApp Protocol| F
    end

    subgraph "WhatsApp"
        F[WhatsApp Servers]
    end

    A <-->|Streamable HTTP<br/>API Key Auth| B

    style A fill:#4A90E2,stroke:#2E5C8A,stroke-width:2px,color:#000
    style B fill:#F5A623,stroke:#C67E1B,stroke-width:2px,color:#000
    style C fill:#9013FE,stroke:#6B0FC7,stroke-width:2px,color:#fff
    style C1 fill:#50E3C2,stroke:#3AAA94,stroke-width:2px,color:#000
    style C2 fill:#BD10E0,stroke:#9012FE,stroke-width:2px,color:#fff
    style C3 fill:#F5A623,stroke:#C67E1B,stroke-width:2px,color:#000
    style D fill:#50E3C2,stroke:#3AAA94,stroke-width:2px,color:#000
    style E fill:#E85D75,stroke:#B5475C,stroke-width:2px,color:#fff
    style F fill:#25D366,stroke:#1DA851,stroke-width:2px,color:#000

How It Works

1. Initial Sync - WhatsApp sends message history on first connection
2. Real-Time Updates - All new messages automatically stored in SQLite
3. MCP Exposure - Tools, prompts, and resources expose functionality to AI
4. On-Demand Loading - Fetch older messages from WhatsApp when needed
5. AI Integration - Claude (or any MCP client) accesses WhatsApp through standardized protocol

🚀 Quick Start

Prerequisites

• Go 1.25.5+ (for local setup) or Docker (recommended)
• WhatsApp account (will be linked via QR code)
• MCP-compatible AI client (Claude, Cursor, etc.)

Option 1: Docker Setup (Recommended)

1. Clone and configure

   git clone https://github.com/felipeadeildo/whatsapp-mcp
   cd whatsapp-mcp
   cp .env.example .env
   # Edit .env with your settings (API key, timezone, etc.)
   

2. Start the server

   docker compose up -d
   

3. Link WhatsApp

   # View logs to see QR code
   docker compose logs -f whatsapp-mcp
   
   # Scan QR code with WhatsApp mobile app:
   # Settings → Linked Devices → Link a Device
   

4. Verify it's running

   curl http://localhost:8080/health
   # Expected: "OK"
   

Option 2: Local Setup

1. Install dependencies

   git clone https://github.com/felipeadeildo/whatsapp-mcp
   cd whatsapp-mcp
   go mod download
   

2. Configure environment

   cp .env.example .env
   # Edit .env with your settings
   

3. Run the server

   go run main.go
   

4. Link WhatsApp (scan QR code shown in terminal)

🔌 MCP Integration

Connect to Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "whatsapp": {
      "type": "http",
      "url": "http://localhost:8080/mcp",
      "headers": {
        "Authorization": "Bearer your-secret-api-key"
      }
    }
  }
}

Connect to Other MCP Clients

The server exposes a Streamable HTTP endpoint compatible with any MCP client:

• URL: http://localhost:8080/mcp
• Transport: Streamable HTTP
• Authentication: Two methods supported (Bearer header preferred)

Option A — Authorization header (recommended):

Keeps the key out of URLs, proxy logs, and shell history.

{
  "mcpServers": {
    "whatsapp": {
      "type": "http",
      "url": "http://localhost:8080/mcp",
      "headers": {
        "Authorization": "Bearer your-secret-api-key"
      }
    }
  }
}

Option B — Key in URL path (backward compatible):

Existing clients using /mcp/{key} continue to work unchanged.

{
  "mcpServers": {
    "whatsapp": {
      "url": "http://localhost:8080/mcp/your-secret-api-key",
      "type": "http"
    }
  }
}

🎨 Usage Examples

Once connected, your AI assistant can:

Search for People

You: "Find all messages from Arthur across all my chats"
AI: [Uses search_person_messages prompt]
    → Finds messages in DMs, groups, everywhere
    → Analyzes communication patterns
    → Provides context about Arthur

Analyze Conversations

You: "What did we discuss in the Tech Team group this week?"
AI: [Uses analyze_conversation prompt]
    → Reads recent messages
    → Summarizes key topics
    → Lists action items and deadlines

Smart Messaging

You: "Tell Maria I'll be 10 minutes late"
AI: [Uses find_chat + send_message]
    → Finds Maria's chat
    → Sends contextual message
    → Confirms delivery

Deep Search

You: "Find all mentions of 'budget meeting' in any chat"
AI: [Uses search_keyword prompt]
    → Searches across all conversations
    → Shows context around each mention
    → Orders by relevance/date

📊 Data & Privacy

Local Storage

All data is stored in ./data/:

• db/ - Database files
  • messages.db - SQLite database with messages and chats
  • whatsapp_auth.db - WhatsApp session credentials
• media/ - Downloaded media files
• whatsapp.log - WhatsApp client logs

⚠️ Important: Database files contain sensitive data. Keep them secure (file permissions 600) and backed up.

🛣️ Roadmap

✅ Implemented

• WhatsApp Web integration via whatsmeow
• Real-time message sync to SQLite
• MCP server with Streamable HTTP transport
• Pattern matching and wildcards
• Sender filtering and cross-chat search
• Timestamp-based pagination
• Timezone support
• On-demand message loading from servers
• Docker deployment (with healthcheck!)

🚧 Planned

• Media Support

  • Voice message transcription
  • Image OCR and analysis
  • Video metadata extraction
  • Document parsing
  • Contact card handling

• GraphRAG Integration

  • Entity extraction from conversations
  • Relationship mapping between contacts
  • Semantic search capabilities
  • Context-aware recommendations

• Enhanced Tools

  • Mark messages as read
  • React to messages (emoji reactions)
  • Send media files
  • Group management (create, members)
  • Status updates
  • Account management (profile picture, name)

• Analytics (maybe)

  • Message statistics
  • Conversation insights
  • Response time tracking

📚 Documentation

MCP Resources (Built-In)

The server includes interactive guides accessible through MCP:

• Workflow Guide - Common operations and patterns
• Cross-Chat Search - Master advanced search techniques
• JID Format Guide - Understanding WhatsApp identifiers
• Search Patterns - Wildcards and pattern matching

AI assistants can access these guides through the MCP Resources API.

Environment Variables

See .env.example and be happy!

🔔 Webhook Events

When WEBHOOK_URL is set, the server POSTs a JSON payload to that URL for every incoming and outgoing message.

Payload Structure

{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "event_type": "message.received",
  "timestamp": "2026-06-14T10:00:00Z",
  "data": {
    "message_id": "3EB0...",
    "chat_jid": "[email protected]",
    "sender_jid": "[email protected]",
    "text": "Hello!",
    "timestamp": "2026-06-14T10:00:00Z",
    "is_from_me": false,
    "message_type": "text",
    "chat_name": "John Doe",
    "sender_push_name": "John",
    "sender_contact_name": "John Doe",
    "is_group": false,
    "media_metadata": null,
    "referral": null
  }
}

Fields

Media Metadata

Present when message_type is image, video, audio, document, sticker, ptt, or gif.

"media_metadata": {
  "message_id": "3EB0...",
  "file_name": "photo.jpg",
  "file_size": 204800,
  "mime_type": "image/jpeg",
  "has_media": true
}

Referral (Click-to-WhatsApp Ads)

When a user taps a Meta ad with a "Message on WhatsApp" button, their first message carries ad attribution metadata (ExternalAdReply in the WhatsApp protocol). The server extracts this and populates referral:

"referral": {
  "ctwa_clid": "ARAkLkA8...",
  "source_id": "120208468219880053",
  "source_type": "AD",
  "source_url": "https://fb.com/ads/...",
  "headline": "Order Now"
}

referral is null for all non-ad messages. It is supported on text, image, and video messages (the message types where WhatsApp carries ExternalAdReply).

Delivery & Retries

Failed deliveries are retried up to WEBHOOK_MAX_RETRIES times with exponential backoff. Delivery attempts are logged in the database and visible via the webhook management API (GET /webhooks/deliveries).

🤝 Contributing

This is a personal project I maintain for daily use. Contributions are welcome!

See CONTRIBUTING.md for:

• Development setup and workflow
• Project structure (main server vs migration CLI)
• Database migration system
• Code style guidelines

Quick start:

1. Fork the repository
2. Create your feature branch
3. Follow the guidelines in CONTRIBUTING.md
4. Submit a pull request

⚠️ Disclaimer

This project is not affiliated with WhatsApp or Meta. It uses the unofficial WhatsApp Web API through the whatsmeow library. Use at your own risk.

Important Notes:

• WhatsApp may change their API at any time
• Using unofficial APIs may violate WhatsApp's Terms of Service
• This is provided as-is with no warranties
• Keep your session data secure

---