> ### This feature is in beta
>
> To use this feature, pass in a header including the `LD-API-Version` key with value set to `beta`. Use this header with each call. To learn more, read [Beta resources](https://launchdarkly.com/docs/api#beta-resources).
>
> Resources that are in beta are still undergoing testing and development. They may change without notice, including becoming backwards incompatible.

The flag events API provides access to flag-event data used in engineering insights project metrics. To learn more, read [Flag health](https://launchdarkly.com/docs/home/observability/flag-health).