A disclosed transaction processing method includes transmitting a request to a credit aggregator in response to a message from a point of sale device to a wireless communication device of a user. Responsive to receiving credit account information from the credit aggregator, a user interface indicative of at least some of the credit account information including account identification information for a plurality of user credit accounts is displayed. Responsive to detecting a user selecting one of the plurality of credit accounts, credit account information is transmitted to the point of sale device. The request may include information identifying the user. The message from the point of sale device may indicate a price associated with the transaction. The credit account information may include available credit information, current balance information, closing date information, payment date information, annual percentage rate information, and so forth.