Strava MCP

Model Context Protocol (MCP) Server + Strava OAuth

This is a Model Context Protocol (MCP) server that supports remote MCP connections, with Strava OAuth built-in. It allows users to connect to your MCP server by signing in with their Strava account.

Overview

The MCP server (powered by Cloudflare Workers) serves two roles:

• Acts as an OAuth Server for your MCP clients
• Acts as an OAuth Client for Strava's OAuth services

This project serves as a reference example for integrating OAuth providers with an MCP server deployed to Cloudflare, using the workers-oauth-provider library.

Prerequisites

• A Strava account
• A Cloudflare account
• Node.js and npm installed
• Wrangler CLI installed (npm install -g wrangler)

Quick Start

1. Clone the repository:

    git clone https://github.com/kw510/strava-mcp.git
    cd strava-mcp
    npm install

2. Set up your Strava API credentials (see Setting Up Strava API Credentials)

3. Set up your Cloudflare KV namespace:

    wrangler kv:namespace create "OAUTH_KV"

   Update the wrangler.toml file with the generated KV ID.

4. Deploy to Cloudflare:

    wrangler deploy

Setting Up Strava API Credentials

For Production

1. Go to Strava's API Settings and create a new application
2. Configure your application:
   • Application Name: Choose a name for your application
   • Category: Select an appropriate category
   • Website: Your website URL
   • Application Description: Brief description of your application
   • Authorization Callback Domain: mcp-strava-oauth.<your-subdomain>.workers.dev
   • Authorization Callback URL: https://mcp-strava-oauth.<your-subdomain>.workers.dev/callback
3. Set your production environment variables:

    wrangler secret put STRAVA_CLIENT_ID
    wrangler secret put STRAVA_CLIENT_SECRET

For Development

1. Create a separate Strava API application for development
2. Configure your development application:
   • Authorization Callback Domain: localhost
   • Authorization Callback URL: http://localhost:8788/callback
3. Create a .dev.vars file in your project root:

    STRAVA_CLIENT_ID=your_development_strava_client_id
    STRAVA_CLIENT_SECRET=your_development_strava_client_secret

Testing Your MCP Server

Using Inspector

1. Install the Inspector tool:

    npx @modelcontextprotocol/inspector@latest

2. Connect to your server:
   • For production: https://mcp-strava-oauth.<your-subdomain>.workers.dev/sse
   • For development: http://localhost:8788/sse

Using Claude Desktop

1. Open Claude Desktop and go to Settings -> Developer -> Edit Config
2. Add your MCP server configuration:

    {
      "mcpServers": {
        "strava": {
          "command": "npx",
          "args": [
            "mcp-remote",
            "https://mcp-strava-oauth.<your-subdomain>.workers.dev/sse"
          ]
        }
      }
    }

3. Restart Claude Desktop and complete the OAuth flow

Development

Local Development

1. Start the development server:

    wrangler dev

2. The server will be available at http://localhost:8788

API Rate Limits

The Strava API has the following rate limits:

• 200 requests every 15 minutes
• 2,000 requests per day

How It Works

OAuth Provider

The OAuth Provider library handles:

• OAuth 2.1 server implementation
• Token issuance and validation
• Secure token storage in KV
• Strava OAuth integration

Durable MCP

Provides:

• Persistent state management
• Secure authentication context storage
• User information access via this.props
• Conditional tool availability

MCP Remote

Enables:

• Client-server communication
• Tool definition and management
• Request/response serialization
• SSE connection maintenance

Troubleshooting

• If you see error messages in Claude Desktop, verify the connection by hovering over the 🔨 icon
• For Cursor integration, use the "Command" type and combine command and args into one string
• Ensure your callback URLs match exactly with what's configured in your Strava application