System, method, and computer program product for automatically monitoring message flow in a message queuing system in an asynchronous messaging network. A message queuing application programming interface appends, in a message descriptor field for recording and monitoring message flow, unique application identification keys of applications that process the message, operation codes applied to the message, and time stamps of operations applied during message processing. The keys are generated by the start-up of the applications and are filled in by each PUT and GET function of the API. After processing of the message, the entries included in the message descriptor field are monitored, and any deviation from a predefined message flow is automatically detected and reported.