An apparatus, system, and method are disclosed for web service access to a remote data source procedure. The method includes receiving a web service request from a client and identifying the procedure call identifier within the web service request. The web service request includes a procedure call identifier and zero or more parameters. The method includes creating a procedure call to a data source procedure accessible through an Application Program Interface. The procedure call is created at least in part by ordering parameters of the procedure call based on an order of the zero or more parameters in the web service request. The parameters of the procedure call are ordered without using an explicit parameter mapping. The method includes sending a web service response to the client in response to receiving a response from the data source procedure. The web service response includes information responsive to the procedure call.