HTTP status code for unaccepted Content-Type in request

Question

For certain resources, my RESTful server only accepts PUT and POST requests with JSON objects as the content body, thus requiring a Content-T

Answer 1

It could be 415 Unsupported Media Type according to this list: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.16.