Api Key for website

Is there a way to obtain API Key for some website extensions and plugins that are required so i can use it for my guild member information, armory?
Here is a pic of one joomla extension that requires API key:
http://i65.tinypic.com/a3l4xd.jpg

P.S. I forgot to mention for Icecrown realm

We currently do not have a public API, but we plan to release one in the future, at least for the armory.