Garmin Mcp App MCP Server

Run Coach — Garmin MCP App

Connect your Garmin watch to Claude Desktop or ChatGPT. Explore interactive charts.

Unofficial. Not affiliated with or endorsed by Garmin. Garmin is a trademark of Garmin Ltd.

Install

Claude Desktop

1. Download the latest .mcpb file from Releases
2. Drag it into Claude Desktop to install
3. Ask Claude anything about your Garmin data — it will prompt you to sign in on first use

ChatGPT (desktop app)

Requires Node.js 20+.

1. In the ChatGPT desktop app, open Settings → Plugins → Add marketplace
2. Source: chenhunghan/garmin-mcp-app (leave Git ref and sparse paths empty) → Add marketplace
3. Restart the app, open the Plugins Directory, choose the Run Coach marketplace and install Coach

Or with the Codex CLI: codex plugin marketplace add chenhunghan/garmin-mcp-app then codex plugin add garmin@garmin-mcp.

Coach then appears in the sidebar (daily briefing and performance dashboard) and as a Training Week tab in conversations; or just ask "@Coach how am I today?". It runs on your computer, so it works in the desktop app only.

Other MCP clients (Cursor, VS Code, Claude Code, Codex CLI, …)

Requires Node.js 20+. Add the server to your client's MCP config:

{
  "mcpServers": {
    "garmin": { "command": "npx", "args": ["-y", "garmin-mcp-app"] }
  }
}

Or from the command line: claude mcp add garmin -- npx -y garmin-mcp-app (Claude Code), codex mcp add garmin -- npx -y garmin-mcp-app (Codex CLI).

Clients that support MCP Apps (e.g. VS Code) show the interactive charts and the sign-in form. Other clients still get every Garmin tool as data, but can't show the sign-in form: sign in once from an MCP Apps client — the tokens are saved in ~/.garminconnect and shared by every client on your computer.

What you can do

Ask Claude about your health, training, and fitness — it reads your Garmin data and shows interactive charts right in the conversation.

• Start your day — a morning briefing: readiness, sleep, HRV, body battery and resting HR against your own baselines, with Claude's suggestions
• See your trends — compare up to 4 metrics over 4 weeks to a year, and ask Claude what changed
• Plan your week — Claude designs a week of training from your data, then creates and schedules the workouts on your Garmin calendar
• Analyze your workouts — per-km splits (even for single-lap runs), HR zones, and training effect
• Track your fitness — training readiness, training load, VO2 Max, race predictions, and 30+ more Garmin metrics

Your Garmin, coached by Claude

The app frames your data against your own baselines; Claude reads it and suggests what to do. Every view has Ask Claude questions built from your numbers, and Claude knows what you're looking at.

Daily briefing — "How am I today?"

Performance dashboard — "How has my fitness trended this year?"

Weekly training plan — "Plan my training week" (or the plan-training-week prompt)

Per-km splits — "Show the splits of my last run"

Screenshots use the built-in demo mode (npm run dev:ui:demo): a fictional runner, no real person's data. Light and dark themes follow Claude Desktop.

What you can visualize

Plot your activities

Visualize training readiness

Privacy & Security

No data is stored or collected by this app. Your data flows directly between your machine and the Garmin Connect API — there is no intermediate server.

• Your credentials stay private. You sign in through a secure login form rendered inside Claude Desktop. The login and MFA tools are marked as app-only (visibility: ["app"]), meaning Claude (the LLM) cannot call them and never sees your email, password, or MFA code.
• Claude doesn't know who you are. The LLM only receives the health/fitness data you ask for (steps, sleep, etc.) — it has no access to your Garmin account credentials, OAuth tokens, or profile (name, email, location).
• Your password is never sent in plain text. The login form encrypts it with a single-use key before it passes through Claude Desktop, so it can't leak into host logs.
• Tokens are stored locally. OAuth tokens are saved on your machine at ~/.garminconnect/ with restrictive file permissions (0600). They are never sent anywhere other than the Garmin Connect API.
• You can log out anytime. Logging out clears all saved tokens from your machine.

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Getting Started

git clone https://github.com/chenhunghan/garmin-mcp-app.git
cd garmin-mcp-app
npm install

npm install automatically sets up git hooks via prek:

• commit-msg — enforces Conventional Commits via commitlint
• pre-push — runs lint, format check, typecheck, and tests (same as CI)

Troubleshooting: core.hooksPath

If npm install warns about core.hooksPath, prek cannot install git hooks. Fix it by unsetting the local config:

git config --unset-all --local core.hooksPath
npm run prepare

Development

npm run dev        # watch-build server + UI
npm run dev:ui     # standalone UI dev at localhost:5173
npm run test:lib   # run garmin-connect tests
npm run pack       # build + package .mcpb bundle

npm run dev:ui opens http://localhost:5173 with the React UI wired to the real MCP server in-process. You can test login, MFA, and logout against the actual Garmin API without deploying to Claude Desktop.

Testing in Claude Desktop

Run npm run build (one-off) or npm run dev (watch mode for live rebuilds), then add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "garmin-mcp": {
      "command": "node",
      "args": ["/absolute/path/to/garmin-mcp-app/dist/index.js"]
    }
  }
}

Restart Claude Desktop. Ask Claude to check your Garmin auth — it will render the app UI in an iframe and run the real login/MFA flow.

Architecture

• MCP Server (src/server.ts) — Node.js server over stdio, registers tools + UI resource
• React UI (src/app.tsx) — Rendered in host's sandboxed iframe, communicates via postMessage
• garmin-connect (packages/garmin-connect/) — TypeScript client library for Garmin Connect OAuth + API

Commit Convention

Commits must follow the Conventional Commits format:

type(optional-scope): description

Allowed types: feat, fix, chore, docs, ci, refactor, test

Disclaimer

Run Coach is an independent, open-source project. It is not affiliated with, endorsed by, or sponsored by Garmin Ltd. or its subsidiaries. Garmin and Garmin Connect are trademarks of Garmin Ltd. or its subsidiaries; they are used here only to describe compatibility. The app uses the unofficial Garmin Connect API with your own account.