A Really Useful Service

Site

http://httpbin.org/

HTTP Request & Response Service hosted in HTTP, HTTPS & EU flavors by Runscope

Examples

wget http://httpbin.org/get?xxxx=1

Returns:

{
  "args": {
    "xxxx": "1"
  }, 
  "headers": {
    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", 
    "Accept-Encoding": "gzip, deflate, sdch", 
    "Accept-Language": "en-US,en;q=0.8", 
    "Host": "httpbin.org", 
    "Upgrade-Insecure-Requests": "1", 
    "User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.111 Safari/537.36"
  }, 
  "origin": "203.3.69.3", 
  "url": "http://httpbin.org/get?xxxx=1"
}