An Internet protocol multimedia subsystem (IMS) application executes services, such as (Internet Protocol) IP contact center services, accessible over different access channels. An IMS application server includes a service creation layer operable to provide components for creating a hosted service, testing the hosted service and deploying the hosted service into a service execution layer. The service execution layer includes service logic components operable to execute the hosted service, and communication components operable to connect to an external service involved in executing the hosted service.