200s

200s refers to the set of HTTP status codes in the 2xx class, which indicate successful handling of a client request. These codes are defined in the HTTP/1.1 specification and its successors, such as RFC 7231, and are used by servers to signal that the request was received, understood, and accepted. While all 2xx responses denote success, the specific code conveys nuanced meaning about the result or subsequent actions.

Common 200s include: 200 OK, the standard success response when a request yields a representation; 201 Created, returned when a new resource is created in response to the request; 202 Accepted, meaning the request has been accepted for processing but is not yet completed; 204 No Content, indicating success without a response body; 205 Reset Content, instructing the client to reset the document view; 206 Partial Content, used for range requests; 207 Multi-Status and 208 Already Reported (WebDAV), which convey multiple statuses; and 226 IM Used, used with instance manipulation.

These codes guide client behavior: 200s generally permit client-side processing of the response body; 204 implies no payload to read; 202 may require polling or asynchronous handling. Caching and proxies treat 2xx responses as successful results. The 2xx class is distinct from the 1xx informational, 3xx redirection, 4xx client error, and 5xx server error codes, forming a core part of HTTP communication semantics.