> 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/reference/health-and-fitness-api.md).

# Unified API

- [Rate limits](https://docs.tryterra.co/reference/health-and-fitness-api/rate-limits.md): Learn the two rate limits on data-read endpoints, the headers that report them, and how to handle a 429.
- [Event types](https://docs.tryterra.co/reference/health-and-fitness-api/event-types.md): Look up every event type Terra sends to your destination, what triggers it, what to do with it, and its payload.
- [Data models](https://docs.tryterra.co/reference/health-and-fitness-api/data-models.md): Look up the fields of every Unified API data model, the samples and enums they use, and how to deduplicate payloads.
- [Authentication](https://docs.tryterra.co/reference/health-and-fitness-api/authentication.md)
- [User](https://docs.tryterra.co/reference/health-and-fitness-api/user.md)
- [Integrations](https://docs.tryterra.co/reference/health-and-fitness-api/integrations.md)
- [Health data](https://docs.tryterra.co/reference/health-and-fitness-api/health-data.md)
- [Planned Workouts](https://docs.tryterra.co/reference/health-and-fitness-api/planned-workouts.md)
- [Routes](https://docs.tryterra.co/reference/health-and-fitness-api/routes.md)
- [Lab Reports](https://docs.tryterra.co/reference/health-and-fitness-api/lab-reports.md)
- [Webhooks](https://docs.tryterra.co/reference/health-and-fitness-api/webhooks.md)