Google Places API - REQUEST_DENIED

Question

What this is NOT

a) a \"sensor=true_or_false\" issue
b) a key is wrong issue (unless the key I got has limitations)
c) too many requests (si

Answer 1

This is actually (b): wrong key. Actually, you're using the wrong kind of key (from Sign Up for the Google Maps API which is only good for the JavaScript V2 API).

Please see Obtaining an API Key for how to get a new API key, of the new kind.

Edit: At the time this question arose, valid API keys that worked on Geocoding API did not work on Places API, but now seem to work fine. Looks like some issue on Google side.