Standard Headers

Header	Request	Response	Comment
Accept-Encoding			Restricts the content-codings that are acceptable in the response.
Accept			Most resources return application/json
Content-Encoding			Return encodings are a sub-list of the codings specified in the Accept-Encoding request header
Content-Type			Most resources use application/json. Return media types must be a sub-list of the media types specified in the Accept request header.
Date			The date and time when the message was sent.
Host			The host and port number of the resource being requested
Server			The software used by the server to handle the request
Via			The proxy or gateway software that forwarded the request to the server
WWW-Authenticate			The authentication challenges required from the HTTP user-agent