Accessing android market form java application

I want to build an java application, kind of a robot that periodically asks for exist apps based on a parameter (id, name, package...).

What I want to know first is how to access the android market API (if there is any..) from my application. What plug-ins, additional jars in my build path do I need, to start communicating with the android market?

More specifically, I saw some answers about how to search, based on given URL's, but my question is even more basic - what are the first steps to access the market? In other words, how do I create a client of the android mark开发者_如何学Pythonet in me application.

BTW, I am using eclipse for JavaEE. I have pretty good pure java programming knowledge, though working with JavaEE, and web application is quite new for me.