Website Monitor with Google Scripts

Use Google Apps Script to monitors website domains and send SMS text alerts when any of these sites are down or inaccessible.

function init() {
  if (ScriptApp.getScriptTriggers().length == 0) {
    // Set up a monitor that triggers every 5 minutes

function websiteMonitor() {
  var response, error, code, urls;

  // The script can monitor multiple website URLs (comma separated)
  urls = SpreadsheetApp.getActiveSheet().getRange('B2').getValue();
  urls = urls.replace(/\s/g, '').split(',');

  for (var i = 0; i < urls.length; i++) {
    var url = urls[i];

    if (!ScriptProperties.getProperty(url)) {
      ScriptProperties.setProperty(url, 200);

    // Trying to connect to the website URL
    try {
      response = UrlFetchApp.fetch(url);
    } catch (error) {
      // If URLFetchApp fails, the site is probably down
      updateLog(url, -1);

    code = response.getResponseCode();
    updateLog(url, code);

function updateLog(url, code) {
  if (ScriptProperties.getProperty(url) == code) return;

  ScriptProperties.setProperty(url, code);

  var sheet = SpreadsheetApp.getActiveSheet();

  var row = sheet.getLastRow() + 1;
  var time = new Date();
  var msg = 'Down';

  if (code == 200) msg = 'Up';

  msg = 'Website is ' + msg + '  ' + url;

  sheet.getRange(row, 1).setValue(time);
  sheet.getRange(row, 2).setValue(msg);

  // Send an email notification when the site status changes
  var email = sheet.getRange('B3').getValue();
  MailApp.sendEmail(email, msg, url);

  var now = new Date(time.getTime() + 10000);

  // Create an event in Google Calendar with an SMS reminder
  if (sheet.getRange('B4').getValue().toLowerCase() == 'yes') CalendarApp.createEvent(msg, now, now).addSmsReminder(0);
Amit Agarwal

Amit Agarwal

Google Developer Expert, Google Cloud Champion

Amit Agarwal is a Google Developer Expert in Google Workspace and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India.

Amit has developed several popular Google add-ons including Mail Merge for Gmail and Document Studio. Read more on Lifehacker and YourStory


Awards & Titles

Digital Inspiration has won several awards since it's launch in 2004.

Google Developer Expert

Google Developer Expert

Google awarded us the Google Developer Expert award recogizing our work in Google Workspace.

ProductHunt Golden Kitty

ProductHunt Golden Kitty

Our Gmail tool won the Lifehack of the Year award at ProductHunt Golden Kitty Awards in 2017.

Microsoft MVP Alumni

Microsoft MVP Alumni

Microsoft awarded us the Most Valuable Professional (MVP) title for 5 years in a row.

Google Cloud Champion

Google Cloud Champion

Google awarded us the Champion Innovator title recognizing our technical skill and expertise.

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