Google Apps Activity API: 403

Question

I am integrating a web application with the Google Apps Activity API and I keep getting the same JSON response when trying out the api on the google developer website

`{
 "error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "accessNotConfigured",
    "message": "Access Not Configured. Please use Google Developers Console to activate the API for your project."
   }
  ],
  "code": 403,
  "message": "Access Not Configured. Please use Google Developers Console to activate the API for your project."
 }
}`

Does anyone know how to get this returning activity data? I can not find anyone online using this API. It seems really useful but no one is using it.

Updated Question:

I have a "Google Apps Unlimited" account for testing as well. I can access other APIs such as the "Google Drive API" just fine. But when it comes to this API, it always retirns this message. I've also activated the "Google Apps Activity API" in my Developer Console. It says "ON" with a 10,000,000 request limit. I also have billing enabled for the project. I have also setup the correct keys. I use Oauth2. I also tried an API key. They give the same result. 403... I have already read all the other stackoverflow posts. No one else seems to be using this API.

Answer 1

After talking to Google Tech Support, it seems this was a google issue. It's now working again. The API was broken for a bit.