Each request to an API-endpoint ends finally in a response from the requested server. And each response includes a lot of information beside the requested data. One important information is the HTTP-Response-Code. Each HTTP-Response-Code has an other meaning. But all are dealing with the success of the request which ends in a response. In the table below we listed all important response-codes. Beside the HTTP-Response-Codes you will find self-coded codes. They will give you a better solution approach - if needed.