All responses from the Frisbii Billing and Pay API will be in JSON. All responses will contain a unique request identifier in the HTTP headers with name Request-Id. The request-id allows Frisbii Billing and Pay to find requests in cases where troubleshooting is necessary.
Frisbii Billing and Pay follows an open for extension, but closed for modification API strategy, meaning that new attributes can be added, but no required attributes are removed. It is important that integrations are implemented to ignore unknown attributes.