Claudex Strava

A Model Context Protocol (MCP) server that connects Claude to your Strava fitness data. Ask Claude questions about your real training history in plain English — no dashboards, no manual exports.

Built with TypeScript, the MCP SDK, and Zod schema validation. Automatic OAuth token refresh included.

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What you can ask Claude

• "How many walks did I do this month?"
• "Where were my last 3 activities?"
• "How do my 2025 and 2026 activity counts compare?"
• "Which of my activities had the most stop time?"
• "Am I hitting my Zone 2 training targets?"

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Prerequisites

• Node.js 18+
• A Strava account with activities
• A Strava API app (create one here)
• Claude Desktop (or any MCP-compatible client)

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Setup

1. Clone and install

git clone https://github.com/your-username/claudex-strava-mcp
cd claudex-strava-mcp
npm install

2. Create your Strava API app

Go to strava.com/settings/api and create an app. Set the Authorization Callback Domain to localhost.

You'll receive a Client ID and Client Secret — keep these safe.

3. Get your refresh token

Copy the example env file and fill in your Client ID and Secret:

cp .env.example .env
# Edit .env and add your STRAVA_CLIENT_ID and STRAVA_CLIENT_SECRET

Then run the OAuth helper:

npx tsx scripts/get-token.ts

This will:

1. Print an authorization URL — open it in your browser
2. Ask you to authorize the app on Strava
3. Redirect to localhost and exchange the code for tokens
4. Print your STRAVA_REFRESH_TOKEN in the terminal

Copy the printed refresh token into your .env:

STRAVA_CLIENT_ID=your_client_id
STRAVA_CLIENT_SECRET=your_client_secret
STRAVA_REFRESH_TOKEN=your_refresh_token

4. Build the server

npm run build

This compiles TypeScript to dist/.

5. Configure Claude Desktop

Add the following to your Claude Desktop config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "strava": {
      "command": "node",
      "args": ["/absolute/path/to/claudex-strava-mcp/dist/index.js"],
      "env": {
        "STRAVA_CLIENT_ID": "your_client_id",
        "STRAVA_CLIENT_SECRET": "your_client_secret",
        "STRAVA_REFRESH_TOKEN": "your_refresh_token"
      }
    }
  }
}

Restart Claude Desktop. The Strava tools will appear in Claude's tool list.

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Project structure

claudex-strava-mcp/
├── src/
│   ├── index.ts           # MCP server entry point
│   ├── strava-client.ts   # Strava API client with auto token refresh
│   └── tools.ts           # 8 MCP tool definitions (Zod-validated)
├── scripts/
│   └── get-token.ts       # One-time OAuth token helper
├── .env.example           # Template — copy to .env and fill in values
├── .gitignore
├── package.json
└── tsconfig.json

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Available tools

Tool	Description
get_athlete_profile	Your Strava profile and preferences
get_athlete_stats	All-time, YTD, and recent totals by sport
list_activities	Paginated activity list with date filters
get_activity	Detailed stats for a single activity
get_activity_laps	Lap-by-lap breakdown
get_activity_zones	Heart rate zone distribution
list_routes	Your saved routes
get_route	Detailed route info

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How it works

The server uses the MCP SDK's McpServer class and registers tools using Zod schemas for runtime validation. The Strava client handles OAuth token refresh automatically — if your access token is within 60 seconds of expiring, it refreshes using your stored refresh token before making any API call.

Claude prompt
    │
    ▼
MCP Tool Layer (TypeScript)
    │
    ├── list_activities  ──► GET /athlete/activities
    ├── get_activity     ──► GET /activities/{id}
    ├── get_activity_zones ► GET /activities/{id}/zones
    └── ...
    │
    ▼
Strava API
    │
    ▼
Structured JSON → Claude reasons → Natural language response

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Development

npm run dev   # Watch mode — recompiles on save
npm run build # Production build
npm start     # Run compiled server

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Security notes

• Never commit your .env file — it's in .gitignore
• Rotate your Strava client secret at strava.com/settings/api if it's ever exposed
• The OAuth scopes requested are read, activity:read_all, and profile:read_all — read-only access only

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License

MIT

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Built by Mostafa Didar Mahdi — Data Scientist, Anthropic-certified AI practitioner, Adelaide.