Google Forms Apps Script to do REST request

formScriptREST.txt

function startProcess(e) {
  var formResponse = e.response;
  var itemResponses = formResponse.getItemResponses();
  var data = {};
  for (var j = 0; j < itemResponses.length; j++) {
    var itemResponse = itemResponses[j];
    var title = itemResponse.getItem().getTitle();
    data[title] = itemResponse.getResponse();
  }
  var options = {
    'method' : 'post',
    'contentType': 'application/json',
    // Convert the JavaScript object to a JSON string.
    'payload' : JSON.stringify(data)
  };
  // start a process instance on KIE Server
  UrlFetchApp.fetch('https://httpbin.org/post', options);
}