GTT REST API supports multiple versions to preserve the backwards compatibility.
When functionality is changed, the new version is introduced, while the behaviour of the previous versions remains unchanged. The list of the supported versions can be checked on the Versions page or by using the versions API end-point.

In order to use the specific version, add "version" parameter to the request:

.../?para1=...&version=2408&paraN=...

If this parameter is not specified, the latest API version is used.

Please note: The old versions can only be supported for the limited amount of time.