OPTIONS

The OPTIONS verb is used when a client would like to retrieve the possible interactions for a resource. Typically, the server will return an Allow header, which will include the HTTP verbs that can be used with this resource.

Request:

OPTIONS /v1/cats/12343 HTTP/1.1 
Content-Length: 0 

Response:

HTTP/1.1 200 OK 
Content-Length: 0 
Allow: GET, PUT, DELETE