> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/provider-coverage-and-per-provider-data-availability/coros-sleep-stages-not-exposed.md).

# Why are COROS sleep stages and sleep score missing?

**COROS's partner API does not expose sleep stages or a sleep score**, so those fields cannot be delivered even though they appear in the COROS Training Hub UI.

What is available is surfaced in full:

* sleep start/end
* average and resting heart rate
* HRV
* calories
* steps

If full sleep stages and scores are critical, providers like **Garmin, WHOOP, Oura and Fitbit** expose them natively.