Unable to access Google Plus API in browser

问题

i am working on to display wall posts (Stream) data using Google Plus API. i have valid Client ID + API_KEY.

I am able to get response from Google Plus cloud console.i.e. by executing method I get Something like

Request

GET https://www.googleapis.com/plus/v1/people/myuserid/activities/public?maxResults=5&key={YOUR_API_KEY}

X-JavaScript-User-Agent: Google APIs Explorer

Response

200 OK

Show headers -

{ "kind": "plus#activityFeed", "etag": "\"Mwea3qudNDf-hWWlPWi3n-YrU1Q/ovxXa0lmTRbwzkDa9o_iJ2pdFBs\"", "nextPageToken": "CAIQgIi2z8bDugIgASgB", "title": "Google+ List of Activities for Collection PUBLIC", "updated": "2013-11-01T12:07:44.665Z", "items": [ { "kind": "plus#activity", "etag": "\"Mwea3qudNDf-hWWlPWi3n-YrU1Q/JdSanh1QlMQ72Ubbabsiz2rP4B8\"", "published": "2013-11-01T12:07:44.665Z", "updated": "2013-11-01T12:07:44.665Z", "id": "id", "url": "https://plus.google.com/userid/posts/bYSPSVjXCXL", "actor": { "id": "116100754354787768146", "displayName": "name", "url": "https://plus.google.com/userid", "image": { "url": "someurl" } }, "verb": "post", "object": { "objectType": "note", "content": "", "url": "https://plus.google.com/userid/posts/bYSPSVjXCXL", "replies": { "totalItems": 1, "selfLink": "https://content.googleapis.com/plus/v1/activities/z13xulwx3qjuxnkii04cjpsqgsjlyp2j23o/comments" }, }

........

Seems good till now..but,when i use Request URL i.e https://www.googleapis.com/plus/v1/people/myuserid/activities/public?maxResults=5&key={MY_API_KEY} i got something from browser like this

{
 "error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "accessNotConfigured",
    "message": "Access Not Configured"
   }
  ],
  "code": 403,
  "message": "Access Not Configured"
 }
}

where i am going wrong ?! how to get correct response from Browser. ? as i want to parse them and use these data in my Application.

NOTE: Google + API is ON.