I have followed these instructions: https://developers.google.com/console/help/#generatingdevkeys/. I registered the freebase service and added the Simple API key for browser apps to the query: https://api.freebase.com/api/service/mqlread?key=keygoeshere&query={MQLquery}
I then get the following error:
{u'code': 100, u'message': u'Invalid API Key (Key not found)', u'stat': u'fail'}
If I remove the key from the query it works locally but remotely I get: freebase api error on deployment to appengine: DownloadError: ApplicationError: 2. Which I believe is due to freebase blocking the appengine because the key is not registered or recognised