const SiteClient = require('datocms-client').SiteClient;
const client = new SiteClient('YOUR-API-TOKEN');
const buildEventId = '34';
client.buildEvent.find(buildEventId)
.then((buildEvent) => {
  console.log(buildEvent);
})
.catch((error) => {
  console.error(error);
});

> node example.js
{
  "id": "34",
  "eventType": "response_success",
  "createdAt": "2016-09-20T18:50:24.914Z",
  "data": {
    "requestBody": "{\"object_kind\":\"build\",\"ref\":\"master\",\"tag\":false,\"before_sha\":\"0000000000000000000000000000000000000000\",\"sha\":\"ecfccf5ea28af900c14b499a2b762e029c7492\",\"build_id\":10495,\"build_name\":\"build\",\"build_stage\":\"test\",\"build_status\":\"success\",\"build_started_at\":\"2016-09-20 18:49:22 UTC\",\"build_finished_at\":\"2016-09-20 18:50:24 UTC\",\"build_duration\":62.279854524,\"build_allow_failure\":false,\"project_id\":195,\"project_id\":\"Stefano Verna / awesome-website\",\"user\":{\"id\":null,\"name\":null,\"email\":null},\"commit\":{\"id\":6754,\"sha\":\"ecfccf5ea28af900c6614b499a2b762e029c7492\",\"message\":\"Update gems\\n\",\"author_name\":\"Stefano Verna\",\"author_email\":\"s.verna@datocms.com\",\"status\":\"success\",\"duration\":62,\"started_at\":\"2016-09-20 18:49:22 UTC\",\"finished_at\":\"2016-09-20 18:50:24 UTC\"},\"repository\":{\"name\":\"awesome-website\",\"url\":\"git@gitlab.com:stefanoverna/awesome-website.git\",\"description\":\"\",\"visibility_level\":0}}",
    "requestHeaders": {
      "via": "1.1 vegur",
      "host": "webhooks.datocms.com",
      "origin": null,
      "version": "HTTP/1.1",
      "connection": "close",
      "connectTime": "0",
      "xRequestId": "5c1beced-0fe3-4c5b-b45d-68ba4a15b5f3",
      "xGitlabEvent": "Build Hook",
      "xForwardedFor": "46.101.135.219",
      "xRequestStart": "1474397424903",
      "totalRouteTime": "0",
      "xForwardedPort": "443",
      "xForwardedProto": "https"
    }
  },
  "buildTrigger": "1822"
}