The API is versioned with a version string specified in the base URL that can be incremented independently from other APIs.
Using the newest available API is always encouraged.
These changes are considered backwards compatible and will not require the version string to be incremented:
Adding properties to JSON objects
Adding new parameters
Changing the number of items returned in a single listing request
The structure or length of identifiers generated by the API
Changing error messages
These changes are considered backwards incompatible and will require the version string to be incremented:
Removing properties from JSON objects
Changing an API's URL structure
The current version is v1