I have a Meteor application and I'm making API calls like:
  
    var urlString = "http://api.stackexchange.com/2.2/users/"+surl;
    HTTP.call ("GET", urlString, {params:{site:"stackoverflow"}}, 
        function (error,result) {
            console.log (result.data);
        }
    );

<br>
At present I'm getting quota-limited to 300 calls only.  
But I want more than 300 and I have an application key.

How do I request, using the API key, so I can get 10,000 calls per day?