2xx

2xx is the class of HTTP status codes that indicate successful handling of a request. In the HTTP protocol, each response carries a three-digit status code; codes in the 2xx range indicate that the server has successfully processed the request and produced a result, or that the requested action has been completed. These codes sit between informational and redirection, and they contrast with 3xx redirects, 4xx client errors, and 5xx server errors.

Common examples include 200 OK, the standard success response; 201 Created, used when a new resource is created as a result of the request; 202 Accepted, meaning the request has been received for processing but is not yet completed; 203 Non-Authoritative Information; 204 No Content, which returns no body; 205 Reset Content, directing the client to reset the document view; and 206 Partial Content, used when fulfilling a range request.

Other 2xx codes include 207 Multi-Status and 208 Already Reported, used by WebDAV, and 226 IM Used, defined for delta encoding of resources. While all 2xx responses indicate success, their payload and semantics vary: 200 and 201 typically include a response body, 204 returns no body, and 206 carries partial content.

In API design and web applications, 2xx codes guide clients on how to handle the result. The specific code chosen reflects whether a resource was created, whether processing is asynchronous, and whether a response body is needed to convey the result.