HTTP Status 415 - Unsupported Media Type

POST /api/users HTTP/1.1
Host: api.example.com
Content-Type: application/xml

<user><name>Alice</name></user>

HTTP/1.1 415 Unsupported Media Type
Content-Type: application/json

{
  "error": "unsupported_media_type",
  "message": "Server does not support application/xml",
  "received_type": "application/xml",
  "supported_types": ["application/json", "application/x-www-form-urlencoded"]
}

POST /api/data HTTP/1.1
Host: api.example.com

{"key": "value"}

HTTP/1.1 415 Unsupported Media Type
Content-Type: application/json

{
  "error": "missing_content_type",
  "message": "Content-Type header required for POST requests",
  "expected_types": ["application/json"]
}

POST /api/resources HTTP/1.1
Host: api.example.com
Content-Type: application/vnd.api+json; version=1.0

HTTP/1.1 415 Unsupported Media Type
Content-Type: application/json

{
  "error": "unsupported_version",
  "message": "API version 1.0 not supported",
  "supported_media_types": ["application/json", "application/vnd.api+json"]
}