MCP Startup Framework

A framework for building MCP servers on Cloudflare Workers with OAuth, PostgreSQL, and Stripe.

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MCP Startup Framework

A complete framework for building remote Model Context Protocol (MCP) servers on Cloudflare Workers with OAuth authentication, PostgreSQL database, and Stripe-powered paid tools.

🚀 Features

  • 🔐 OAuth 2.1 Provider - Complete authentication with user registration/login
  • 🗄️ PostgreSQL Integration - Scalable production-ready database with connection pooling
  • 💳 Paid Tools Framework - Stripe-powered premium tools with subscription support
  • 🌐 Platform Agnostic - Optimized for Cloudflare Workers but deployable anywhere (Vercel, Railway, AWS, self-hosted)
  • 🛠️ MCP Tools Framework - Modular tool system with user context
  • 🔌 REST API Routes - Easy-to-use system for adding custom endpoints
  • 🎨 Custom Views - Extensible UI system for privacy policies, ToS, documentation pages
  • 📡 Streamable HTTP Transport - Works with mcp-remote for local Claude Desktop integration
  • 📱 Cross-Platform - Works on desktop, web, and mobile MCP clients

⚡ Quick Start

Prerequisites

  • Node.js 18+
  • Cloudflare account
  • PostgreSQL database (see database setup)
  • Stripe account (for paid tools)

Installation

# Clone the repository
git clone https://github.com/f/mcp-startup-framework
cd mcp-startup-framework

# Install dependencies
npm install

# Copy environment template
cp .dev.vars.example .dev.vars

Configuration

Edit .dev.vars with your settings:

DATABASE_URL="postgresql://username:password@host:port/database"
JWT_SECRET="your-super-secret-jwt-key"
COOKIE_ENCRYPTION_KEY="32-character-encryption-key"
STRIPE_SECRET_KEY="sk_test_your_stripe_key"
STRIPE_PRICE_ID_FOR_PREMIUM_MATH="price_your_stripe_price_id"
BASE_URL="https://your-domain.workers.dev"

Development

# Start development server
npm run dev

# Initialize database (in another terminal)
curl -X POST http://localhost:8787/init-db

# Visit http://localhost:8787 to register/login

🛠️ Adding Tools & Routes

Everything starts from src/index.ts:

// Register MCP tools
backend
  .registerTool(registerAddTool)
  .registerTool(registerGreetingTool)
  .registerTool(registerPremiumMathTool);

// Add REST API routes
backend
  .route('GET', '/api/status', (c) => c.json({ status: 'ok' }))
  .authRoute('GET', '/api/profile', (c, userContext) => 
    c.json({ user: userContext })
  );

See Tools Guide and Routes Guide for details.

Custom Views

Extend beyond MCP with custom pages:

// Add privacy policy, terms of service, documentation
backend
  .route('GET', '/privacy', (c) => c.html(generatePrivacyPage()))
  .route('GET', '/terms', (c) => c.html(generateTermsPage()))
  .route('GET', '/docs', (c) => c.html(generateDocsPage()));

See Views Guide for creating custom pages.

🚀 Deployment

# Set production secrets
wrangler secret put JWT_SECRET
wrangler secret put COOKIE_ENCRYPTION_KEY
wrangler secret put STRIPE_SECRET_KEY

# Set custom price IDs per paid tool
wrangler secret put STRIPE_PRICE_ID_FOR_PREMIUM_MATH

# Deploy to Cloudflare
npm run deploy

See Deployment Guide for full instructions.

🔗 Integration Options

Using claude.ai (Pro Plan)

For claude.ai Pro users, you can integrate directly:

  1. Navigate to claude.ai settings
  2. Click "Add Integration"
  3. Enter your server URL: https://your-domain.workers.dev/sse
  4. Complete the OAuth flow

Using Claude Desktop

For local Claude Desktop app:

1. Install MCP Remote Client

npm install -g mcp-remote

2. Configure Claude Desktop

Open Claude Desktop settings: Settings > Developer > Edit Config

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "my-startup": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://your-domain.workers.dev/mcp"
      ]
    }
  }
}

3. Restart Claude Desktop

After saving, restart Claude Desktop. Your MCP tools will appear in the chat interface.

Transport Options

The framework supports multiple transport protocols:

  • Streamable HTTP (default) - /mcp endpoint
  • Server-Sent Events (SSE) - /sse endpoint

Both work seamlessly with mcp-remote for local development and production use.

🌐 Platform Flexibility

While optimized for Cloudflare Workers, this framework runs anywhere:

  • Vercel: Deploy with @vercel/node runtime
  • Railway: One-click deploy with built-in PostgreSQL
  • AWS Lambda: Use with RDS or Aurora Serverless
  • Google Cloud Run: Deploy with Cloud SQL
  • Self-hosted: Run with Docker on any VPS

Simply update your database connection and deployment configuration!

Production Database

The framework works with any PostgreSQL provider:

  • Neon - Serverless PostgreSQL with autoscaling
  • Supabase - PostgreSQL with real-time features
  • Railway - Managed PostgreSQL with automatic backups
  • Amazon RDS - Enterprise-grade PostgreSQL
  • Cloudflare Hyperdrive - Connection pooling for optimal performance

All providers support the scalability needed for production MCP servers.

📚 Documentation

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

📄 License

MIT License - see LICENSE file for details.

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