Google Contacts API not allowing more than 7 requests per second (different users)

Question

We are trying to make more than 7 requests per second (different users) to Google Contacts API and we are getting response as:

 <errors xmlns="http://schemas.google.com/g/2005">

 <error>

  <domain>usageLimits</domain><code>userRateLimitExceeded</code> 

  <internalReason>User Rate Limit Exceeded</internalReason>

 </error>

</errors>

we are noway near to the quota "requests per 100 seconds per user" or "requests per day".

Is there a way where we can check quota on application level ?