#AppianFitnesse Web service automation

You could create an action that wraps the webservice and makes the call, then displays the results. I'm not sure why you'd want to, though.

Correct me if my understanding is wrong, You want to automate the WebService using Appian FitNesse. If so

Appian is communicating with the Web service with Request and Response often we may take the Response data for processing and display to the end user in the SAIL Form(can persist to DB also).
We Can write the FitNesse scripts with different scenarios, Input the Test data for all possible scenarios and Verify the results for each data displayed in the form.
If anything is failed again we need mannual effort from where exactly it has broken(from the service side or from appian side while processing the Response data or from both)
In this case we cannot test the WebService alone From AppianFitnesse. AFAIK Its better to test the Service from the native language it was written in.

Lets see what other Practitioners suggest.