What response code indicates that the request was successful in Dynatrace API?

The response code that indicates a successful request in the Dynatrace API is 200 - OK. This status code is part of the standard HTTP response codes and signifies that the request was received, understood, and processed successfully by the server. It is commonly used in RESTful APIs to confirm that a client's request has been successfully completed.

The other options, while indicating different successful or unsuccessful request states, do not directly denote a general successful response as clearly as the 200 status code. For instance, 201 - Created typically means that a new resource has been successfully created as a result of the POST request; 204 - No Content indicates that the request was successful, but there’s no content to send in the response body. Meanwhile, 400 - Bad Request signifies that the server cannot process the request due to a client error, clearly indicating a failure rather than a success. Thus, the 200 - OK status code is the most universally recognized indication of a successful request in the context of APIs, including Dynatrace.