Systems and methods are provided for using an agent computer system to obtain information from multiple service-provider computer systems. The method comprises, in response to receiving search criteria at the agent computer system from a client computer system, determining one or more service-provider computer systems with which to communicate to obtain information satisfying the search criteria, determining, for each of said one or more service-provider computer systems, a communication protocol to use to communicate with the service-provider computer system to obtain information satisfying the search criteria, transmitting from the agent computer system to each of said one or more service-provider computer systems, using the communication protocol determined to be used with each service-provider computer system, a request to obtain information satisfying the search criteria, and receiving at the agent computer system from each of said one or more service-provider computer systems a response to the request.