I just added Google Places API Web Service to my project, added an API key (unrestricted, for testing) and I am copy pasting requests from the docs to try things out, for example:
curl https://maps.googleapis.com/maps/api/place/details/json?placeid=ChIJN1t_tDeuEmsRUsoyG83frY4&key=my_new_key
I only get Request Denied ("This service requires an API key."), but in the API console I do not see any errors. The key is really in the curl command line in my sample, the API is enabled in the console, the key is valid and not restricted. I cannot find a reason why this should not work?