You are brilliant! All I did was set user agent as:
User-Agent: Mozilla
and it worked!!! :)
I've discovered that the request User-Agent is rejected if it's not that of standard browser. See if you can change that in Azure.
I did find my API key, so now I can play with it. I'm seeing a 500 response when no UserAgent is specified. We should be able to take it from here.
You can go here to get 1,000 test queries free.
Thanks for the tip. :) I hope they didn't block API access from servers on purpose. I wonder, is there a way to set some permissions in my WL app that allows Azure? I have it set to Public.