Facebook request

app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

//requestify
var requestify = require('requestify');

var routes = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});
app.use('/', routes);
app.use('/users', users);

app.get('/tcfb/', function (req, res) {
  if (req.query['hub.verify_token'] === 'minha_voz') {
    res.send(req.query['hub.challenge']);
  }
  res.send('Error, token errado');
});

var token = "xxxxx";

function sendTextMessage(sender, text) {
  messageData = {
    text:text
  }
  /*
  request({
    url: 'https://graph.facebook.com/v2.6/me/messages',
    qs: {access_token:token},
    method: 'POST',
    json: {
      recipient: {id:sender},
      message: messageData,
    }
  }, function(error, response, body) {
    if (error) {
      console.log('Erro ao enviar mensagem: ', error);
    } else if (response.body.error) {
      console.log('Erro: ', response.body.error);
    }
  });*/
  requestify.request('https://graph.facebook.com/v2.6/me/messages', {
     method: 'POST',
     qs: {access_token:token},
     json: {
       recipient: {id:sender},
       message: messageData,
     }
  }).then(function(error, response, body) {
    // get the response body
    //response.getBody();
    if (error) {
      console.log('Erro ao enviar mensagem: ', error);
    }

    // get the response headers
    //response.getHeaders();

    // get specific response header
    //response.getHeader('Accept');

    // get the code
    //response.getCode();

    // Get the response raw body
    //response.body;
  });
}
function sendGenericMessage(sender) {
  messageData = {
    "attachment": {
      "type": "template",
      "payload": {
        "template_type": "generic",
        "elements": [{
          "title": "First card",
          "subtitle": "Element #1 of an hscroll",
          "image_url": "http://messengerdemo.parseapp.com/img/rift.png",
          "buttons": [{
            "type": "web_url",
            "url": "https://www.messenger.com/",
            "title": "Web url"
          }, {
            "type": "postback",
            "title": "Postback",
            "payload": "Payload for first element in a generic bubble",
          }],
        },{
          "title": "Second card",
          "subtitle": "Element #2 of an hscroll",
          "image_url": "http://messengerdemo.parseapp.com/img/gearvr.png",
          "buttons": [{
            "type": "postback",
            "title": "Postback",
            "payload": "Payload for second element in a generic bubble",
          }],
        }]
      }
    }
  };
  request({
    url: 'https://graph.facebook.com/v2.6/me/messages',
    qs: {access_token:token},
    method: 'POST',
    json: {
      recipient: {id:sender},
      message: messageData,
    }
  }, function(error, response, body) {
    if (error) {
      console.log('Error sending message: ', error);
    } else if (response.body.error) {
      console.log('Error: ', response.body.error);
    }
  });
}
app.post('/tcfb/', function (req, res) {
  messaging_events = req.body.entry[0].messaging;
  for (i = 0; i < messaging_events.length; i++) {
    event = req.body.entry[0].messaging[i];
    sender = event.sender.id;

    /*if (event.postback) {
      text = JSON.stringify(event.postback);
      sendTextMessage(sender, "Postback received: "+text.substring(0, 200), token);
      continue;
    }*/

    if (event.message && event.message.text) {
      text = event.message.text;
      /*if (text === 'Generic') {
         sendGenericMessage(sender);
         continue;
       }*/
      sendTextMessage(sender, "Text received, echo: "+ text.substring(0, 200));
      console.log("Postou mensagem");
      console.log(text);
    }


  }
  res.sendStatus(200);
});

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});


module.exports = app;

Thanks for this :)
Best to remove your 'token' though dude!