1. A system for invoking a service, the system comprising: an invoking entity configured to send a service invocation request to effectuate invocation of a service, the service invocation request being formatted and sent in accordance with a given messaging architecture; and a network entity configured to receive the service invocation request, and send a response to the service invocation request across a SIP (Session Initiation Protocol) architecture, the response including a payload formatted in accordance with the given messaging architecture, wherein the invoking entity is configured to send, and the network entity is configured to receive, the service invocation request independent of the SIP architecture.