MapzenAPIProblem

adapters.application.js

import DS from 'ember-data';
import Ember from 'ember'; 

export default DS.JSONAPIAdapter.extend({
  urlForFindRecord(id, modelName, snapshot) {
    let url = this._super(...arguments);
    let query = Ember.get(snapshot, 'adapterOptions.query');
    if (query) {
      url += '?' + Ember.$.param(query); // assumes no query params are present already
    }
    return url;
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  ajax: Ember.inject.service(), 
  appName: 'Ember Twiddle',
  response: null,
  actions: {
    action: function() {
       var response  = this.get('ajax').request('https://search.mapzen.com/v1/autocomplete', {
        method: 'GET',
        dataType: "json", 
        data: {
          "text": 'Boston',
          "api_key": "search-5f1bwRf"
        }
      }); 
      
      this.set('response', response);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<button {{action 'action'}}>A Button</button>
{{response}}
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": { 
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.js",
    "ember": "2.3.2",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.3.2"
  },
  "addons": {
  	"ember-ajax": "2.4.1" 
  }
}