Website Uptime Monitoring for Free — Build It in 30 Lines

#devops #monitoring #javascript #free

You don't need Pingdom or UptimeRobot. A simple Node.js script + Apify scheduler = free monitoring.

The Check

async function check(url) {
  const start = Date.now();
  try {
    const res = await fetch(url, { method: "HEAD", signal: AbortSignal.timeout(10000) });
    return { url, isUp: res.status < 400, status: res.status, responseMs: Date.now() - start };
  } catch (e) {
    return { url, isUp: false, error: e.message, responseMs: Date.now() - start };
  }
}