I can pass a URL as a parameter and I will receive a shortened URL in the JSON response. If I pass an invalid URL that doesn't follow the valid http://www.example.com format, the JSON response will contain an error instead. When I visit that shortened URL, it will redirect me to my original link.
Example usage:
<URL>/new/http://freecodecamp.com/news
Example output:
{ "original_url": "http://freecodecamp.com/news", "short_url": "<URL>/1" }