INTEGRATING THIRD PARTY SHOPPING CART APPLICATIONS WITH AN ONLINE PAYMENT SERVICE

A method may include receiving at an online payment service hosted on a first system, detailed information from an auction management (AM) system, the AM system hosted on a second system remote from the first system. The information may concern an item purchased by a user from a network-based commerce facility and placed in a virtual shopping cart on the AM system. The detailed information may be sent by the AM system in response to receiving an intent to proceed with payment for the item. A user interface may be communicated to the user that facilitates processing of the payment for the item. The processing may include marking the payment as being an AM payment. The interface may allow the user to view the detailed information and the detailed information describing contents of the virtual shopping cart on the AM system.