API Versioning

The documentation and OpenAPI info.version identify the documented API family as v2.2.

The separate GET /version operation has the published example response:

"2.2.3"

VALIDATION REQUIRED: The public sources do not establish whether 2.2.3 is an API version, WHMCS module version, backend implementation version, or build version.

Compatibility Policy

No public backward-compatibility, deprecation, support-window, or breaking-change notification policy is currently defined. Follow the Changelog for documentation updates, and confirm production upgrade requirements with Register.ly support.