Payvment is a US based startup with an online shopping cart offering as a webservice. They makes use of PayPal’s new Adaptive Payments API, which was developed in an effort to compete with Amazon’s Flexible Payments API. PayPal’s API gives developers, and Payvment in this case, full access to PayPal’s features, allowing them a lot more freedom in building applications, which includes the ability to accept and distribute payments. So now, with Payvment’s Facebook app, anyone can open up a retail storefront on Facebook.
Payvment’s network character disconnects the shopping cart from the store, just like in a store in store concept. Just keep shopping through different stores and put stuff in your cart. In other words, Payvment creates a unified shopping cart across Facebook for buyers. Standalone sites who want to use Payvment’s shopping cart experience can also implement Facebook Connect, to let consumers access their personal shopping cart from Facebook.
The Payvment technology is offered as a free web service. The only costs incurred are the PayPal fees for the user. According to Facebook and this screenshot, the solution should be available outside the US soon.