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HTTP Status Code: 201 - CREATED

The request has been fulfilled and resulted in a new resource being created. The newly created resource can be referenced by the URI(s) returned in the entity of the response, with the most specific URI for the resource given by a Location header field. The response SHOULD include an entity containing a list of resource characteristics and location(s) from which the user or user agent can choose the one most appropriate. The entity format is specified by the media type given in the Content-Type header field. The origin server MUST create the resource before returning the 201 status code. If the action cannot be carried out immediately, the server SHOULD respond with 202 (Accepted) response instead.


A 201 response MAY contain an ETag response header field indicating the current value of the entity tag for the requested variant just created.

The primary resource created by the request is identified by either a Location header field in the response or, if no Location field is received, by the effective request URI.

The 201 response payload typically describes and links to the resource(s) created. Validator header fields convey metadata about the selected Validator header fields convey metadata about the selected representation. In responses to safe requests, validator fields describe the selected representation chosen by the origin server while handling the response. Note that, depending on the status code semantics, the selected representation for a given response is not necessarily the same as the representation enclosed as response payload.

In a successful response to a state-changing request, validator fields describe the new representation that has replaced the prior selected representation as a result of processing the request.

For example, an ETag header field in a 201 (Created) response communicates the entity-tag of the newly created resource's representation, so that it can be used in later conditional requests to prevent the "lost update" problem

Wikipedia
The request has been fulfilled and resulted in a new resource being created.

Successful creation occurred (via either POST or PUT). Set the Location header to contain a link to the newly-created resource (on POST). Response body content may or may not be present.
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