The Gallery API is still a mystery to me as I don't have a use case for it and therefore haven't worked with it yet. I'd love to see some examples of it in action.
You'll be happy to know that we're taking this idea and expanding it to Rest APIs in general with Alteryx and we've added it as a session to the Alteryx Technology Track. Thank you for your suggestion!
I am using the REST API with success but I am having difficulty specifying the parameter value(s) for a "QuestionListbox" type. The schema retruned from the "questions" api call is below. But nothing I do to indicate which of the reports are checked seems to work when I post the request. The error is always "At least 1 report must be selected." Please advise.