Don't have time to elaborate but you should check out URI::Amazon::APA (read the source code!). It is a URI interface to some of Amazon's services and it's really simple and powerful at the same time. It seems like a good match for what you're doing. Making the request (LWP... or WWW::Mechanize would be fine) and parsing the responses is up to you still, of course. If their reply data format is sane it won't be hard. Good luck.