Firebase MCP Server for Railway

A Firebase Model Context Protocol (MCP) server designed for deployment on Railway.com using Streamable HTTP transport.

Features

• Firebase Authentication: User management (create, read, update, delete users)
• Firestore Database: Document and collection operations with advanced querying
• HTTP/HTTPS API: Streamable HTTP transport for remote MCP client connections
• Railway Ready: Optimized for Railway.com deployment with proper configuration

Quick Deploy to Railway

Or manually:

1. Fork this repository
2. Connect to Railway.com
3. Set environment variables (see below)
4. Deploy!

Environment Variables

Required

Set these in Railway's environment variables:

# Firebase service account as JSON string (recommended for Railway)
FIREBASE_SERVICE_ACCOUNT_JSON='{"type":"service_account","project_id":"your-project",...}'

# OR use file path (less secure for cloud deployment)
# FIREBASE_SERVICE_ACCOUNT_PATH="/path/to/service-account.json"

# Optional API key for authentication
MCP_API_KEY="your-secret-api-key"

Getting Firebase Service Account

1. Go to Firebase Console
2. Select your project → Settings → Service Accounts
3. Click "Generate new private key"
4. Copy the entire JSON content and set as FIREBASE_SERVICE_ACCOUNT_JSON

Local Development

# Install dependencies
npm install

# Copy environment template
cp .env.example .env
# Edit .env with your Firebase credentials

# Run in development mode
npm run dev

# Build for production
npm run build
npm start

API Endpoints

Once deployed on Railway, your server will have:

• Health Check: GET https://your-app.railway.app/health
• MCP Endpoint: POST https://your-app.railway.app/mcp

Connecting MCP Clients

Claude Desktop Configuration

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "firebase-remote": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-fetch", "https://your-app.railway.app/mcp"],
      "env": {
        "AUTHORIZATION": "Bearer your-secret-api-key"
      }
    }
  }
}

Other MCP Clients

Configure any MCP client to connect to:

• URL: https://your-app.railway.app/mcp
• Transport: Streamable HTTP
• Auth: Bearer your-secret-api-key (if MCP_API_KEY is set)

Available Tools

Firebase Authentication

• firebase_get_user - Get user by UID
• firebase_create_user - Create new user with email/password
• firebase_list_users - List all users (with pagination)
• firebase_delete_user - Delete user by UID

Firestore Database

• firebase_get_document - Get single document
• firebase_set_document - Create/overwrite document
• firebase_update_document - Update specific fields
• firebase_delete_document - Delete document
• firebase_query_collection - Advanced collection queries with filters, ordering, limits

Example Usage

After connecting to Claude Desktop:

"Create a new user with email test@example.com and password secret123"

"Get all documents from the 'products' collection where price > 100, ordered by name"

"Update the user document in 'users' collection with ID 'user123' to set status to 'active'"

Security Considerations

• Always use HTTPS in production (Railway provides this automatically)
• Set MCP_API_KEY for authentication
• Use Firebase security rules to restrict database access
• Never expose service account keys in client-side code

Deployment Architecture

MCP Client (Claude Desktop)
    ↓ HTTPS + Streamable HTTP
Railway.com Server
    ↓ Admin SDK
Firebase Project (Auth + Firestore)

Local vs Official Firebase MCP

Feature	This Server	Official Firebase CLI MCP
Deployment	✅ Railway.com	❌ Local only (stdio)
Transport	✅ Streamable HTTP	❌ Stdio only
Remote Access	✅ Yes	❌ No
Tools Count	9 core tools	40+ tools
Maintenance	Custom	Google maintained

Use this server for remote/cloud deployments. Use the official Firebase CLI MCP for local development.

Support

• Railway Documentation
• Firebase Documentation
• MCP Specification

License

MIT