EXTERNALCALLOUT is a function available to you when working with custom macros in Decision, Select, and Snapshot processes in interactive flowcharts. EXTERNALCALLOUT can be used to make a synchronous call to an external service, for example, to request the credit score for a particular audience level.

To use external callouts, you must write the external service in Java by using the IAffiniumExternalCallout interface. For more details about the IAffiniumExternalCallout, see the Unica Interact Administrator's Guide.