Connect Garmin Connect to Claude or any MCP client. Ask about last night's sleep, HRV trends, Body Battery, training load, or a specific run, all from your real Garmin account.

Published on PyPI as garmin-personal-mcp.

Unofficial project, official API. This isn't made by Garmin, but it only talks to Garmin's documented Personal API through Garmin's own Python client.

Why this one?

Most Garmin MCP servers sign in with your Garmin password through the unofficial garminconnect library, which breaks whenever Garmin changes its login. In October 2026 Garmin opened a Personal API for individuals. This server uses it:

• No password, no scraping: a revocable Personal API key you create in Garmin Connect, exchanged for short-lived tokens
• The whole Personal API: every working endpoint in Garmin's reference has a tool, with every documented filter
• Any date range: ranges longer than an endpoint allows (28 days for steps, 31 for sleep, and so on) are split into requests for you
• Model-sized responses: all-day sample arrays are left out unless you ask for them
• Read-only: the Personal API can't change your account, and neither can this server

Quickstart

1. Save your Personal API key (one-time; see Authentication):

   uvx garmin-personal-mcp auth
   

2. Add the server to your client.

   Claude Code

   claude mcp add garmin -- uvx garmin-personal-mcp
   

   Claude Desktop (claude_desktop_config.json)

   {
     "mcpServers": {
       "garmin": {
         "command": "uvx",
         "args": ["garmin-personal-mcp"]
       }
     }
   }
   

3. Ask it something: "how did I sleep last night?", "is my HRV trending down this month?", "compare my last three long runs".

Requires uv. Any MCP client that speaks stdio or streamable HTTP works, not just Claude.

Authentication

1. Sign in to Garmin Connect on the web and open Settings → Personal API.
2. Create a key and choose how long it lasts (30 days to a year). Garmin shows it once.
3. Run garmin-personal-mcp auth and paste it at the hidden prompt. The server checks it with Garmin before saving it to ~/.config/garmin/connect-personal-api-key with owner-only permissions.

Where there's no terminal to prompt in (a script, or a shell an agent runs), pipe the key in instead, e.g. pbpaste | garmin-personal-mcp auth.

garmin-personal-mcp auth --check reports whether the saved key still works, without prompting. Garmin emails you about a week before a key expires: create a new one and run auth again. No restart is needed; the server reads the key on every call.

Instead of the key file you can set GARMIN_PERSONAL_API_KEY, which takes precedence. The key file and bearer-token cache are the same ones Garmin's gc-personal CLI uses, so a key saved by either works for both.

Tools

All tools take dates as YYYY-MM-DD. Range tools default to the 7 days ending today. Tools that return a list wrap it as {"results": [...]}.

Weights are in grams, distances in meters, and durations in seconds, as Garmin returns them.

Remote / HTTP mode

The default transport is stdio. For network clients:

garmin-personal-mcp --http --host 127.0.0.1 --port 8491

This serves streamable HTTP at /mcp. There is no built-in authentication. Never expose it to the internet. Bind to localhost and front it with something that authenticates for you: a VPN or tailnet (e.g. tailscale serve), an authenticating reverse proxy, or an OAuth-aware MCP gateway. Behind a proxy, pass --allowed-host <proxy hostname> (repeatable) so the DNS-rebinding check accepts its Host header.

Configuration

Troubleshooting

• "Garmin rejected the Personal API key": the key expired or was deleted. Create a new one and run garmin-personal-mcp auth.
• "No usable Garmin Personal API key was found": run garmin-personal-mcp auth, or set GARMIN_PERSONAL_API_KEY in the client config.
• {"no_data": ...}: Garmin has nothing for that date yet (today's HRV before you've slept, for example), or your device doesn't record that metric.
• HTTP 400 on a long range: an endpoint without a documented limit rejected the range. Ask for a shorter one.

FAQ

Is this the official Garmin API? Yes. It uses Garmin's Personal API, which anyone with a Garmin Connect account can enable without applying, through Garmin's Apache-licensed Python client. The project itself is independent.

Can it change my Garmin data? No. The Personal API is read-only. The one tool that writes anything, garmin_download_activity, saves a file on your own machine.

Which MCP clients does it work with? Any client that runs a stdio or streamable HTTP server, including Claude Desktop, Claude Code, Cursor, Windsurf, Cline, and VS Code. AI coding agents can follow llms-install.md.

Where does my data go? The server talks only to Garmin. Your key and bearer token stay in ~/.config/garmin/. Tool results go to whichever MCP client and model you connect it to.

Can I use it for other people's accounts? No. Garmin's Personal API is for your own data. Apps serving other users need Garmin's business developer program.

How it works

• garmin-personal-mcp auth saves the key; each call exchanges it for a bearer token through Garmin's PersonalApiAuthenticator, which caches the token until an hour before it expires. A token rejected early gets one retry with a fresh exchange.
• Each tool maps to one endpoint on personal.connectapi.garmin.com (garmin_get_day combines several). Ranges longer than an endpoint's documented maximum are fetched in consecutive windows and concatenated.
• Bulky per-minute sample arrays are dropped by default to keep responses readable for a model; include_samples or chunks bring them back.

Development

git clone https://github.com/Mason-Levyy/garmin-personal-mcp
cd garmin-personal-mcp
uv sync
uv run pytest

Tests run against synthetic fixtures; no account needed. Lint and formatting are enforced with ruff (uv run ruff check ., uv run ruff format .).

Contributing

Issues and pull requests are welcome, especially when Garmin adds endpoints to the Personal API. See CONTRIBUTING.md for setup, style, and the PR checklist, and SECURITY.md for how to report vulnerabilities privately. Release history is in CHANGELOG.md.

License

MIT. Garmin and Garmin Connect are trademarks of Garmin Ltd. or its subsidiaries; this project is not affiliated with or endorsed by Garmin.