Retrieving image license and author information in wiki commons

Question

I am trying to use the wikimedia API for wiki commons at:

http://commons.wikimedia.org/w/api.php

It seems like the commons API is very immature

Answer 1

Late answer but you can request the "extmetadata" data with the following query:

http://en.wikipedia.org/w/api.php?action=query&prop=imageinfo&iiprop=extmetadata&titles=File%3aBrad_Pitt_at_Incirlik2.jpg&format=json

Look under imageinfo.extmetadata.UsageTerms, Artist, Credit, etc.