My API has a method with an optional parameter, that is passed as path:

api/v1/ISV/Credits/[Channel]

It is marked as [HttpGet("{customer?}")] and is declared as:

public string Credits(string channel="")

in the WebAPI Tester, it is listed as: 

http://localhost:5000/api/v1/ISV/Credits/{channel}

And I can only call it as .../ISV/Credits/WhatsApp (passing the parameter); if I don't pass any parameter, "{channel}" is passed as parameter value.

However, I can call it correctly in PostMan (even though I would prefer using the WebAPI Tester...) with both:

http://localhost:5000/api/v1/ISV/Credits

http://localhost:5000/api/v1/ISV/Credits/WhatsApp

The only workaround I've found to call it from WebAPI Tester is to mark the method with both [HttpGet] and [HttpGet("{channel}")]. If I mark the method as [HttpGet, Route("ISV/Credits/{channel?}")] I get the same effect: working in PostMan but not in WebAPI Tester.

Is there anything I can do to test the call properly with WebAPI Tester? (i.e.: editing the query command before pressing "Send")

Thanks,

GL