webhook.js

var http = require('http');
var url = require('url');

function webhook(urlStr, data, cb) {
  var postData = JSON.stringify(data);

  var options = url.parse(urlStr);
  options.method = 'POST';
  options.headers = {'Content-Type': 'application/json', 'Content-Length': postData.length};

  var req = http.request(options, function(res) {
    var body = '';
    res.setEncoding('utf8');
    res.on('data', function(chunk) {
      body += chunk;
    });
    res.on('end', function() {
      cb(null, body);
    })
  });

  req.on('error', function(err) {
    cb(err);
  });

  req.write(postData);
  req.end();
}

// Function Webhook
Parse.Cloud.define('hello', function(request, response) {
  var urlStr = ''; // TODO: replace with webhook URL
  var data = {functionName: 'hello', params: request.params};
  webhook(urlStr, data, function(err, data) {
    if (err) {
      response.error(err);
    } else {
      response.success(data);
    }
  });
});

// Trigger Webhook
Parse.Cloud.afterSave('Person', function(request) {
  var urlStr = ''; // TODO: replace with webhook URL
  var data = {triggerName: 'afterSave'};
  webhook(urlStr, data, function(err, data) {
    if (err) {
      console.error(err);
    } else {
      console.log(data);
    }
  });
});