An Express.js application that pings your urls and warns you about HTTP status code changes by email

Arrowbreaker: Sup

Sup is an easy to setup web application for Node.js that will ping your urls and warn by email if their HTTP status code changes.

  • link to demo.
  • link arrowbreaker

This module is open source but not free. More info soon (link to arrowbreaker)

npm install arrowbreaker-sup
var settings = {
  // Gmail example 
  email_server: {
    user: '',
    password: 'yourpassword',
    host: '',
    ssl: true
  from: 'Sup <>',        // <optional> Defaults: Sup <> 
  interval: 5000,                           // <optional> Defaults: 10000 
  data_file: __dirname + '/data.json',      // <optional> Defaults: __dirname/data.json 
var sup = require('arrowbreaker-sup')(settings); // Initialize sup 
  • We use the wonderful emailjs module. The email_server option gets passed directly into email.server.connect method. So check their documentation to for more options. The email server is optional but you wont get an email warnings without it.
  • The interval option is the amount of time between each ping.
  • The data_file option should point to a file on disk where sup will store your settings in a json format. If the doesn't exist it will be create.
var http = require('http');
var server = http.createServer(;  // This returns an Express.js app and creates an http server; 
sup.socket(server);                         // Socket IO needs an http server 
var http = require('http');
var base = express();
base.use('/sup',;                // Attach sup to your base app 
var server = http.createServer(base);       // Create the server; 
sup.socket(server);                         // Socket IO needs an http server 

Use this if you are already using in your application.

var http = require('http');
var socketio = require('');
var server = http.createServer(;  // Create the server; 
var io = socketio.listen(server);           // needs an http server 
io.set('log level', 3);                     // Custom settings 
sup.attachSocket(io);                       // Attach 

If you have suggestions, bugs or need help don't be shy and open an issue.