There are two stable versions of the Public API: the Public API v1 and the Public API v2.
When using the Public API v1, we encourage you to request v1 via the
API-Version: 1 header. Similarly, use
API-Version: 2 to request API v2.
By default, all requests to a relay receive the v1 version of the Public API. We encourage you to request this version via the
API-Version header explicitly.
You can also set the API version by adding the
API v1 has been officially deprecated. Documentation on this API may be found in the Archive. If you are running v1 nodes or services dependent on the v1 API; attempt to migrate as soon as possible. You can read more on migration here.