wordpress custom url with dummy content

i want to add custom url with dummy content like belwo :

http://ift.tt/1G3I7EQ

i want to show paramvalue on page load just

how can i do this .

i tried using :

add_action('parse_request', 'my_custom_url_handler');

function my_custom_url_handler() {
    if(**mycondition**){
      echo "<h1>TEST</h1>";
      exit();
   }
}

how i check my condition please guide