Our API uses semver for versioning. In order to prevent API updates from breaking your application, we strongly recommend that you specify a version with each API request.
You can specify your desired version using the X-Api-Version header. We also allow partial version matching which means that if you want to specify the major and minor version only you can specify the header as X-Api-Version: 1.1 and you will get the latest 1.1.X release.