4sp.in UN-Shorten API

Just put the 4sp.in URL you want to find out the destination URL of after http://4sp.in/unshortenapi?url= and it will return the real URL.
You must include the protocol, http:// ftp:// https://.

Examples:
http://4sp.in/unshortenapi?url=http://4sp.in/2lj
or
http://4sp.in/unshortenapi?url=http://4sp.in/2lk

or and example of a bad URL.
http://4sp.in/unshortenapi?url=http://somesite.company/

or a shortened URL 4sp.in doesn't know about.
http://4sp.in/unshortenapi?url=http://4sp.in/2zyxwv

If the URL is valid and can be restored, the API will return the full URL, nothing more.
If the URL is NOT valid, the API will return the word: ERROR.