The ShapeDiver API has a fast release cycle. A new version is released approximately every two weeks. Older versions are always supported and you will never be required to update the version of the API used in your application. However, it will be necessary in order to enjoy new features developed in later version.
You can always find the latest version of the ShapeDiver API by visiting the API reference. The main page of the reference points to the current version, its release date and detailed release notes about the latest changes.