Modernizing the Fitbit Developer Experience.
The Fitbit Web APIs are moving to a new, scalable infrastructure. We will be deprecating the legacy Fitbit Web API in September 2026. To ensure uninterrupted data continuity for your users, you will need to migrate your applications. Detailed migration guides are live on the Google Health API developer site.
Active Zone Minutes Time Series
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Active Zone Minutes (AZM) Time Series

The Active Zone Minutes (AZM) Time Series endpoints are used for querying the user's heart-pumping activity throughout the day. Developers can request the following API endpoints when integrating the AZM data type:

If your application has been granted intraday access, the following endpoints can be used. See Intraday.