MCP Servers for Fitness Data: Official Options and STAS

If your workouts already live in one service and its limits suit you, the official connector is enough. If you want ChatGPT and Claude on one saved context, any watch brand, a ready summary of your history, and a plan written to the calendar after your confirmation, STAS does that on top of Intervals.icu.

• ✓Intervals.icu has its own connector for Claude, ChatGPT, Gemini and Grok. It can add, move and delete workouts in the Intervals.icu calendar after your confirmation.
• ✓Strava gives subscribers an official connection to Claude and, in the US only, to Gemini. It is read-only, and there is no official Strava connection to ChatGPT.
• ✓COROS has an official MCP server: it reads your data and can create plans and workouts for ChatGPT and Claude.
• ✓Amazfit has announced an MCP in its roadmap; on 6 November 2026 it is not released. Unofficial Zepp servers exist, but Zepp does not support them.
• ✓STAS connects any watch that sends workouts to Intervals.icu, such as Garmin, COROS, Polar, Suunto, Huawei or Amazfit, to both ChatGPT and Claude with one saved context.

The options differ in availability, data coverage and capabilities. Check the limits against what you want from the AI.

There is no single winner here. Match the option to the watch on your wrist and the AI app you actually use.

• ✓The official connector is enough if your workouts already sit in one service, you accept its limits, and you use the AI apps it supports. The Intervals.icu connector covers ChatGPT, Claude, Gemini and Grok but needs the Supporter plan ($4 a month on 6 November 2026).
• ✓The Strava connection to Claude is enough if you only want to ask Claude about your Strava history and do not need ChatGPT or plan writing.
• ✓The COROS MCP is enough if you train on COROS and want plans and workouts created by the official server.
• ✓STAS is the better fit if your watch can be any brand, you want ChatGPT and Claude on one saved context, you need a ready summary of your training history, and you want the plan written to the Intervals.icu calendar only after your confirmation.
• ✓You can keep both: official connections and STAS are separate setups and work side by side.

STAS works on top of Intervals.icu, so the first steps are about getting your workouts there.

1. 1Create an Intervals.icu account and connect your watch brand to it directly.
2. 2Open Activities in Intervals.icu and check that a recent workout shows pace, heart rate and laps.
3. 3Sign in to STAS with the same Intervals.icu account.
4. 4Add STAS in ChatGPT or Claude as shown below.
5. 5In the chat, ask the AI to update your data, then name your last workout.

ChatGPT and Claude use the same STAS data. Sign in with the Intervals.icu account that receives your workouts.

Didn't work? What to check if STAS won't connect

Verify with a real workout, not only the connection screen.

1. 1Ask the AI to update your data, then name your last workout with date, duration and average heart rate.
2. 2Compare the answer with Activities in Intervals.icu.
3. 3If a workout shows only by date, it arrived through Strava. Reconnect that watch to Intervals.icu directly.
4. 4Record a new workout and check that it appears in the chat without manual steps.

STAS reads only data you approve through Intervals.icu. How STAS handles it is described in the privacy policy.

An official connector gives an AI access to one service. STAS adds the following on top of your Intervals.icu data.