Patent ID: 7953642

Claim:
A computer-implemented method, comprising: receiving, at an open payment system that processes payment transactions for a plurality of registered vendors, a first request from a remote computing device to select a first item for purchase on a first vendor page provided by a third-party system that is separate from the open payment system; selecting, from among the plurality of registered vendors, a first vendor that corresponds to the first vendor page; associating the received first request with the first vendor; and providing to the remote computing device, in response to the received first request, data for displaying, in a same window as the first vendor page and without a browser refresh after receiving the first request, information relating to the selected first item to a user of the remote computing device on the first vendor page without a browser window refresh action occurring on the remote computing device, wherein the data for displaying information relating to the selected first item comprises data that indicates that a user of the remote computing device has selected the first item for purchase.