WePay

The WePay API is a simple set of low-level calls that can be used to build all sorts of things on top of WePay's payment platform. WePay is a service that allows groups to collect, manage, and spend money. Using the API, users can build applications that allow them to colect donations for a cause, collect money from a group of friends or implement multi-group payment management. The API uses RESTful protocol and responses are formatted in JSON, JSONP and TXT.