Coupling state aware systems

A method of coupling asynchronous process interaction between computer systems integrated within an overall system of interconnected systems includes receiving a set of information describing an invocation call for execution of a first process on a first system integrated within the overall system; correlating a first callback argument received upon completion of the first process that includes a first unique identifier for the first process generated by the first system with the set of information according to the first unique identifier for the first process; and sending a notification message to a callback endpoint in a second process implemented to receive notification upon completion of the first process by the first system indicating completion of the first process. The second process executing on a second system integrated within the overall system makes the invocation call. The set of information specifies the first unique identifier and the callback endpoint.