It would be extremely useful if we could test our Rests methods on the documentation screen itself.
Do something like swagger.
I thought about creating a new tab on this screen so we could call our test methods.
I don't think that's possible functionality, it would invalidate the Swagger definition. Perhaps a link to a different test page could be added.
There's a forge component that does that for you. Just pass in the url of your exposed service https://www.outsystems.com/forge/component-overview/4110/swaggerui