GSMA Supporting API
Supporting APIs consist of the following: - **Heartbeat API:** Used for monitoring purposes and establishes whether the system of an API provider is in a state that enables a client to submit a request for processing within established SLAs. - **Request State API** : Used to determine the state of an asynchronous request. - **Responses API** : In some circumstances, the client may not have received the final representation of the resource for which it attempted to create or update. The **Responses** API allows a client to identify and retrieve the final representation of the resource assuming that the resource was created.