Is angular/http at angular2.js or http.js?

To use the Http class in Angular2, you need to include the http.dev.js file:

<script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="node_modules/rxjs/bundles/Rx.js"></script>
<script src="node_modules/angular2/bundles/angular2.dev.js"></script>
<script src="node_modules/angular2/bundles/http.dev.js"></script>

You need to specify HTTP_PROVIDERS when bootstrapping your main component to maker it available in dependency injection:

import {bootstrap} from 'angular2/platform/browser'
import { HTTP_PROVIDERS } from 'angular2/http';
(...)

bootstrap(MainComponent, [ HTTP_PROVIDERS ]);

You can then inject it within a component or a service as described below:

@Component({
  selector: 'first-app',
  template: `
    (...)
  `
})
export class AppComponent {
  constructor(http:Http) {
    this.http = http;
  }

  executeHttpRequest() {
    this.http.get('https://angular2.apispark.net/v1/companies/')
             .map(res => res.json())
             .subscribe({
                data => this.companies = data });
  }
}

Hope it helps you, Thierry