The Modernised API follows a versioned endpoint structure to manage changes over time. The older API version uses endpoints like https://{hostname}/{product}/v1 or https://{hostname}/{product}/v2while the Modernised API introduces new endpoints under https://{hostname}/v3/{resource-path}/{action}.Since the endpoints structure has changed, integration will need to be updated to use /v3/ and the older version will be deprecated gradually. Each version has its own API specification, so participant should refer to the appropriate API specification for the version they are using.