(let ((url-inhibit-uncompression t))
  (switch-to-buffer
   (url-retrieve-synchronously
    "http://api.stackexchange.com/2.2/filter/create")))

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: application/json; charset=utf-8
Content-Encoding: gzip
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST
Access-Control-Allow-Credentials: false
X-Content-Type-Options: nosniff
Date: Sat, 01 Nov 2014 03:19:40 GMT
Content-Length: 1903

{
  "quota_remaining": 178,
  "quota_max": 300,
  "has_more": false,
  "items": [
    {
      "filter": "default",
      "filter_type": "safe",
      "included_fields": [
        ".backoff",
        ".error_id",
        ".error_message",
        .................
        "write_permission.min_seconds_between_actions",
        "write_permission.object_type",
        "write_permission.user_id"
      ]
    }
  ]
}