@dynamicsninja/garminconnect-mcp

Talk to Claude to create Garmin workouts, and read or manage the rest of your Garmin Connect data, through an MCP server built on garminconnect-js.

"Make me a 6×400 m session at 5k pace with 2-minute jog recoveries, put it on Thursday, and send it to my watch."

Claude previews the workout, waits for your OK, saves it to your Garmin workout library, schedules it, and pushes it to your device.

Unofficial: not made by, or affiliated with, Garmin.

What you need

Node.js 18 or newer (node --version to check).
A Garmin Connect account.
Claude Desktop, or any other MCP client (see Other MCP clients).

Set up

Easiest: the Claude Desktop Extension

Download garminconnect-mcp-<version>.mcpb from the latest release.
Double-click it (or drag it onto Claude Desktop's Settings → Extensions) and choose Install.
Ask Claude something about your Garmin data. The first time, Claude opens a Garmin sign-in page in your browser; sign in there (with your MFA code if you use one) and tell Claude you're done.

Optional settings (tool groups, download folder) are under Settings → Extensions → Garmin Connect.

Other ways to install: npm

1. Install

npm install -g @dynamicsninja/garminconnect-mcp

Install it once rather than running it through npx: Claude Desktop starts several copies of a server at the same moment, and parallel npx installs into one cache folder can break each other (ERR_MODULE_NOT_FOUND … ajv/dist/2020.js).

In a terminal (your password never passes through Claude):

garminconnect-mcp login

It asks for your Garmin email (or, on older accounts, your username), password and, if you use it, your MFA code. The session is saved to ~/.garminconnect-mcp/tokens and renews itself as long as it is used at least once every 30 days.

3. Add it to Claude Desktop

Settings → Developer → Edit Config, and add a garmin entry to claude_desktop_config.json. Point node at the installed server. To find the path, run npm root -g and append /@dynamicsninja/garminconnect-mcp/dist/cli.js.

Windows (use forward slashes):

{
  "mcpServers": {
    "garmin": {
      "command": "node",
      "args": ["C:/Users/<you>/AppData/Roaming/npm/node_modules/@dynamicsninja/garminconnect-mcp/dist/cli.js"]
    }
  }
}

macOS / Linux:

{
  "mcpServers": {
    "garmin": {
      "command": "node",
      "args": ["/usr/local/lib/node_modules/@dynamicsninja/garminconnect-mcp/dist/cli.js"]
    }
  }
}

If node itself is not found (common with nvm), use its full path from which node as command.

4. Restart Claude Desktop

Quit it completely: tray / menu-bar icon → Quit. Closing the window leaves it running, and it will not read the new config. Start it again, open a new chat, and the Garmin tools appear under the tools icon in the message box.

Using it

Just ask. Some things to try:

"Create a strength workout: 3 rounds of 10 back squats at 60 kg, 12 push-ups and a 1-minute plank, 90 s rest between rounds."
"Build a swim set for a 25 m pool: 400 easy, 8×100 free on 15 s rest, 200 cool-down."
"Schedule that workout for Thursday and send it to my watch."
"How did I sleep last night, and what's my training readiness today?"
"Summarise my last run: distance, pace, average heart rate and training effect."
"What are my race predictions, and how has my HRV trended this month?"

Workouts are always previewed first. Claude shows the workout in readable form (steps, targets, paces in /km and /mi) and saves nothing until you confirm. Exercise names are checked against Garmin's catalogue, and a mistake in a workout comes back to Claude with exactly where it is, so it can fix it.

Claude Desktop asks before each tool call. You can allow a tool once or always. Tools that delete or overwrite data (deleting activities, workouts, gear, weigh-ins, and so on) are marked destructive, and Claude is told to confirm with you before using them.

What it can do

sign_in_to_garmin: signs you in through a page that opens in your browser, MFA included — no terminal needed. See Easiest: the Claude Desktop Extension above.
Workouts: preview_workout, create_workout, update_workout, search_exercises, for running, cycling, swimming, strength, HIIT, yoga, pilates, mobility, cardio, rucking and multi-sport; plus listing, scheduling, sending to your watch and deleting.
Everything else in garminconnect-js: sleep, HRV, stress, Body Battery, training readiness and status, race predictions, activities (list, details, download, upload files, RPE and feel), gear, courses, race calendar, devices, badges, weigh-ins, food logging (with Garmin Connect+), and more. One tool per library method.

Not exposed: logout (it would delete your saved session), the raw-JSON workout uploads (the checked create_workout replaces them), and the raw GraphQL passthrough unless you opt in.

Settings (environment variables)

Variable	Default	Meaning
`GARMIN_MCP_TOKEN_DIR`	`~/.garminconnect-mcp/tokens`	Where the session is saved
`GARMIN_MCP_DOWNLOAD_DIR`	`~/Downloads/garmin`	Where downloaded files (FIT, GPX, …) go
`GARMIN_MCP_GROUPS`	all	Comma-separated tool groups: `wellness`, `activities`, `metrics`, `workouts`, `gear`, `courses`, `calendar-events`, `devices`, `badges-challenges`, `body-composition-weight`, `womens-health`, `golf`, `profile-and-misc`. Matched case-insensitively; an unknown name is ignored (and if none you list are valid, everything loads). The workout-builder tools are always on. Fewer groups means less of Claude's context used.
`GARMIN_MCP_ENABLE_GRAPHQL`	off	Set to `1` to expose `query_garmin_graphql`

Set them under "env" in the config entry, for example:

"garmin": {
  "command": "node",
  "args": ["…/dist/cli.js"],
  "env": { "GARMIN_MCP_GROUPS": "workouts,metrics,wellness,activities" }
}

GARMIN_EMAIL (an email or, on older accounts, a username) and GARMIN_PASSWORD, when both are set, work like the extension's email and password settings: the server signs in by itself when there is no saved session (not with MFA).

If you change GARMIN_MCP_TOKEN_DIR, sign in with the same value (GARMIN_MCP_TOKEN_DIR=/path/to/dir garminconnect-mcp login), or the server won't find your session.

Troubleshooting

The tools don't appear. Make sure Claude Desktop was fully quit and restarted (step 4). Then Settings → Developer → garmin shows the server's status and a link to its log.
"Not logged in to Garmin" or "session expired": ask Claude to sign in again (it calls sign_in_to_garmin), or run garminconnect-mcp login again. The running server picks up the new session on the next request; no restart needed.
Sign-in page didn't open: Claude's reply includes the link; open it in any browser on this computer. It expires after 15 minutes — ask Claude to sign in again.
ERR_MODULE_NOT_FOUND after trying npx: delete the _npx folder in your npm cache (npm config get cache shows where) and use the global install above.
"Garmin is rate limiting requests": Garmin throttles bursts of calls. Wait a minute and ask again.
HTTP 412 when saving anything (EU accounts): grant upload consent in Garmin Connect's settings once; until then Garmin refuses every write.
Very detailed activity data looks cut off: a single tool result is capped at 100,000 characters, and per-second activity data (get_activity_details) is usually larger. Ask for a summary instead, or download the activity file (download_activity) and open it elsewhere.

Updating

npm install -g @dynamicsninja/garminconnect-mcp@latest

then quit and restart Claude Desktop. Your saved session is kept.

Other MCP clients

Any client that can start a stdio server works. The command is garminconnect-mcp (or node …/dist/cli.js). For example, in Claude Code:

claude mcp add garmin -- garminconnect-mcp

Good to know

Dates are calendar dates in UTC (YYYY-MM-DD).
Everything runs on your machine. Your Garmin session stays in your token folder and is sent only to Garmin. See PRIVACY.md for the full picture.
Garmin Connect's API is unofficial and can change. This server is released in lockstep with garminconnect-js, and each release is tested against the library version it contains.