Good point. In the example I gave, the request is forwarded to a business process which has a job ID.

In VS Code, you can create a debugger launch configuration for your API endpoint. Set the "request" attribute to "attach" and the "processID" attribute to the job ID of the production component that services your API. Set breakpoints and run this configuration. Then when a request arrives, you can debug the service and endpoints while viewing the REST request contents.

Here is a reference video; example starts at 4:00.

https://www.youtube.com/watch?v=diLHwA0rlGM

As Ben promised, here is the Learning Services link for Tim's presentation: https://learning.intersystems.com/course/view.php?id=1928

And here is the InterSystems Developers YouTube link for Tim's presentation: https://www.youtube.com/watch?v=elVQEU9MitE