If you go with the API route then I suggest to use a polyglot action in the language of your choice. The context object in the polyglot containers hold an API and a token to make callbacks to itself. Then you can use the appropriate REST libs for the given language to do what you want. I have a simple action that just returns the url and token t…

vro_polyglot_context.py

def handler(context, inputs):
    outputs = {
      "vcoUrl": context['vcoUrl'],
      "token": context['getToken']()
    }
    return outputs