The following possibilites can be used:

http://1click.at/api.php?action=shorturl&url=http://THEURL.TLD&format=simple

http://1click.at/api.php?action=shorturl&url=http://THEURL.TLD&format=xml

http://1click.at/api.php?action=shorturl&url=http://THEURL.TLD&format=json

Have fun with

1click.at