A method, system, apparatus, and computer program for conducting a real-time payment settlement transaction. The method receiving a request for endpoint data, and, in response to receiving the request, determining whether one or more directories, among a plurality of directories, can provide the endpoint data requested in the request. The method also includes identifying at least one directory, among the directories determined to be able to provide the endpoint data requested in the request, as a selection for providing the endpoint data, and obtaining the endpoint data from the at least one directory identified in the identifying. In one example embodiment, the endpoint data includes an account number of a payee account and a routing number of a payee entity. A payment message or a request for payment message can be routed using the obtained endpoint data.