How the relay actually works
Coros runners tend to be loyal for a reason: the battery lasts, the data is clean, and the training tools respect the sport. What Coros does not do is talk to Wellness Project directly, and there is no Coros MCP server. So how does an AI end up reading your runs? Through the health hub your phone already keeps.
The Coros app syncs your watch, then writes workouts, heart rate, and sleep into Apple Health on iPhone or Google Health Connect on Android. Wellness Project reads that hub, structures the entries into a proper training history, and exposes it to Claude and ChatGPT through a single MCP connection. No data is pulled out of Coros through a partner API. Stated plainly, the route is Coros to Apple Health or Health Connect to Wellness Project to Claude or ChatGPT.
Set it up in four steps
Three links do the work: Coros into the hub, Wellness Project onto the hub, and the AI onto Wellness Project. Work through them in order.
Let the Coros app write to your phone's health hub
In the Coros app, turn on the export to Apple Health (iPhone) or Google Health Connect (Android) and allow it to write workouts, heart rate, and sleep. The Coros app is the intermediary, the hub is where Wellness Project reads. Sync your watch once so recent runs land in the hub.
Connect Wellness Project to that hub
In Wellness Project, connect Apple Health or Health Connect and grant read access to workouts, heart rate, sleep, steps, and HRV. Wellness Project now reads whatever Coros deposited and organizes it into a structured, queryable training log.
Add the Wellness Project MCP connector to Claude or ChatGPT
Add Wellness Project as a connector in Claude (via MCP) or ChatGPT (via the plugin). That single connector is the entire AI integration, and it is the same one whether your data came from a Coros, a phone, or a ring. There is no separate Coros step here.
Ask about your running in plain language
Ask Claude or ChatGPT whether your mileage is ramping too fast, how your heart rate behaved on your last long run, or whether recovery kept pace with a hard week. The AI reads your structured Coros history and answers against it.
After those three links are set, the pipe runs itself. Each new run moves from watch to Coros app to hub to Wellness Project without you touching anything.
Why the relay beats an integration you do not have
Coros users care about a training block holding together, not about a logo on a partner page. The relay serves that. Because Wellness Project reads the same hub your phone already trusts, there is no brittle partner API to break and no extra Coros login to expire.
The honest tradeoff is freshness: this path is only as current as the Coros app export into the hub. For endurance coaching that plays out over weeks of mileage and recovery, that cadence is exactly right.
Put your Coros runs in front of an AI coach.
Relay Coros through Apple Health or Health Connect into one AI coach that reads your whole training history. Free during early access.