Polar MCP Server
About
MCP server for Polar AccessLink API to export data from Polar watches.
Details
- Author
- nelsonnew
- Categories
- Other, API
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Setup
Install Polar MCP Server in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/nelsonnew/polar-mcp-server
Follow the installation instructions in the repository README, then restart your MCP client.
An MCP (Model Context Protocol) server for the Polar AccessLink API. Connect your Polar fitness data to Claude AI - access workouts, sleep analysis, recovery metrics, heart rate data, and more.
No setup required!Use our hosted instance:
- In Claude:Settings → Integrations → Add MCP Server
- Enter the URL:https://polar-mcp-server.n-neuhaeusel.workers.dev/mcp
- Claude will open an authorization window — log in with your Polar account
- Start chatting about your fitness data!
- Polar Pacer / Pacer Pro
- Polar Vantage V2 / V3
- Polar Vantage M / M2
- Polar Grit X / Grit X Pro / Grit X2 Pro
- Polar Ignite / Ignite 2 / Ignite 3
- Polar Unite
- And more...
- "Show me my workouts from last week"
- "How was my sleep last night? Compare it to my weekly average"
- "Analyze my heart rate variability trends"
- "What's my current training load status?"
- "When should I go to bed tonight for optimal recovery?"
- "Export my last run as a GPX file"
- "How many steps did I take this month?"
Want to run your own instance? Two deployment options available:
Option 1: Cloudflare Workers (Recommended)
- Cloudflareaccount
- Polar AccessLinkAPI credentials
# Clone and install git clone https://github.com/NelsonNew/polar-mcp-server.git cd polar-mcp-server npm install # Create KV namespace npx wrangler kv namespace create OAUTH_KV # Copy the ID to wrangler.toml # Set secrets npx wrangler secret put POLAR_CLIENT_ID npx wrangler secret put POLAR_CLIENT_SECRET # Deploy npm run deploy
After deploying, add the callback URL to your Polar app:
https://YOUR-WORKER.workers.dev/callback
# Clone and build git clone https://github.com/NelsonNew/polar-mcp-server.git cd polar-mcp-server npm install && npm run build # Get access token export POLAR_CLIENT_ID="your_client_id" export POLAR_CLIENT_SECRET="your_client_secret" npm run auth
Add to Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json):
{ "mcpServers": { "polar": { "command": "node", "args": ["/path/to/polar-mcp-server/dist/index.js"], "env": { "POLAR_ACCESS_TOKEN": "your_access_token" } } } }
All tools use thePolar AccessLink API v3.
- Your Polar credentials are never stored
- OAuth tokens are managed securely by the Cloudflare Workers OAuth provider
- Each user gets their own isolated MCP session
- No fitness data is logged or stored on our servers
Contributions welcome! Please open an issue or PR.
- Polar AccessLink API
- Polar Developer Portal
- MCP Protocol
- Cloudflare Workers
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