nc://athletedata

Athletedata: the athlete's own training and health data from 39 apps, through the athletedata MCP server. A Nodecode rewrite of athletedata-health/mcp by athletedata-health.

athletedata is a hosted MCP server for athletes. Connect your training and health apps once at athletedata.health -- Garmin, Oura, WHOOP, Hevy, Apple Health, Intervals.icu, Cronometer, Withings, Zwift and more -- then ask the agent about your own data instead of pasting numbers: activities, training load (CTL, ATL, TSB), HRV and resting heart rate, readiness, sleep trends, power and pace curves, race predictions, nutrition and body composition.

The cell speaks the server's own protocol, MCP over Streamable HTTP, with the core's HTTP seam. It registers two tools:

The server serves its tool set at run time, so the two verbs outlive any version of it; the list is asked once and kept for the process.

Get it

Tell the agent "add the athletedata cell", or run:

nodecode add nc://athletedata

Set it up

You need an athletedata account (there is a 7-day free trial) and the key on its MCP page, sk_soma_.... Put it in the environment variable the section names, ATHLETEDATA_API_KEY by default:

export ATHLETEDATA_API_KEY=sk_soma_...

or set athletedata.api_key_env to another variable's name. The section:

"athletedata": {
  "api_key_env": "ATHLETEDATA_API_KEY",     // the variable holding the key
  "url": "https://mcp.athletedata.health/mcp",
  "timeout_seconds": 60,
  "allow_writes": false                       // true: a writing tool runs without confirm
}

A key that is set but refused, or a section with no key at all, is said in the answer and in the cell's own line; /athletedata shows which variable it is looking at and whether one is set. Every call, with its arguments, goes to mcp.athletedata.health: that is the whole point of the cell, and nothing else is sent anywhere.

Use it

Ask about your training, sleep or recovery; the agent lists the server's tools and picks one. From eval:

(help :athletedata)                         ; the primer the model reads
(nle::find-tool "athletedata_tools")        ; what the model calls

or type /athletedata for its state and /athletedata tools for the list.

Writing tools -- push a workout to the watch, log a meal, create a Hevy routine -- change the athlete's own accounts. The server marks the tools that only read; any other one refuses to run until the call carries confirm: true (or allow_writes is on), so the agent asks first.

What is in it

License

MIT. The original package is Copyright (c) 2026 HealthspanOS AG: see LICENSE and NOTICE.