title: How to use google plus domain api
body: <p>I can call any Google+ API from the Google API Explorer, but any Google+ Domain API says "You do not have permission to execute this method." and returns next error:</p>
  
  <p>403 Forbidden</p>
  
  <pre><code>{
    "error": {
      "errors": [{
        "domain": "global",
        "reason": "forbidden",
        "message": "Forbidden"
      }],
      "code": 403,
      "message": "Forbidden"
    }
  }
  </code></pre>
  
  <p>The same issue I have when use google+ domain .net api library.</p>
  
  <p>Does Google+ Domain API work? Are there some live examples?</p>