We uses conventional HTTP response codes to indicate the success or failure of an API request.

HTTP Status Codes summary
200 OK
400 Your request is invalid and/or not formed properly. You need to reformulate your request.
401 No valid API key provided.
402 The parameters were valid but the request failed please contact administrator.
403 The API key doesn’t have permissions to perform the request.
404 No record found.
405 The request was unacceptable, often due to missing a required parameter.
406 Virtual NIN does not exist.