Hi, The method described in the spec to update Resource Set descriptions[1] is supposed to return a HTTP 204 including the _id value of the successfully updated resource set description. but the HTTP Status Code Definition for 204 says, The 204 response MUST NOT include a message-body, and thus is always terminated by the first empty line after the header fields. Therefore is it correct to include a body in a 204. Is it possible to do that? Am I missing a trick here? [1] https://docs.kantarainitiative.org/uma/draft-oauth-resource-reg.html#rfc.sec... Thanks, -- *A.Farasath Ahamed* Undergraduate | Department of Computer Science and Engineering,University of Moratuwa Article Writer | MoraSpirit Mobile: +94 777 603 866 Blog: http://thepseudocode.blogspot.com E-Mail: mefarazath@gmail.com