User JQuery with the Tumblr API & JSONP

ajax_jsonp.js

$.ajax(
  'http://api.tumblr.com/v2/blog/codingjester.tumblr.com/posts?api_key=<your_key>',
  {
    dataType: 'jsonp',
    success: function (d) {
      console.log(d); // On success log the data to the console   
    },
  }
);

// More explicit information
$.ajax('https://api.tumblr.com/v2/blog/codingjester.tumblr.com/posts', 
  {
    dataType:'jsonp', 
    data: { 
        limit : 1, 
        api_key : 'your_key'
    }, 
    success: function(d) { 
        console.log(d); 
    }
  }
);