Krayon Digital uses conventional HTTP response codes to indicate the status of issued API requests. Krayon conforms with the HTTP status code numbering conventions:
Code range 2xx indicates success cases.
Code range 4xx indicates errors when failing to provide the required input information, for example, a required parameter was omitted. Some errors, such as when a transaction fails, provide additional details to explain the error and how to mitigate it.
Code range 5xx indicates an error from Krayon Digital's servers (these are rare).
For more information go to HTTP status code.