title: PHP ecommerce API?
body: <p>Is there such a thing as an open source PHP ecommerce <strong>API</strong>? That is, <em>just</em> the API (i.e., not a whole CMS etc.). I just want some sort of "library" I can invoke from my own code. All of the open source ecommerce solutions that I've run across (such as <a href="http://www.opencart.com/" rel="nofollow">http://www.opencart.com/</a>) include a whole UI, etc., which I don't want.</p>