Monitor
Open source · Free npm package

Website monitoring
for developers

Playwright-based checks with retries, screenshots, alerts, and HTML reports. Zero config to get started.

Get started freeView on GitHub

Up and running in minutes

One config file. Two commands. Your sites are being watched.
# Install
npm install -D @alosha/monitor

# monitor.config.ts
export default {
  checks: [
    { name: 'Homepage', url: 'https://yoursite.com', interval: '5m' },
    { name: 'API',      url: 'https://api.yoursite.com/health', interval: '1m' },
  ],
  notify: { slack: { webhookUrl: process.env.SLACK_WEBHOOK_URL } }
}

# Run once
npx monitor run

# Or watch continuously
npx monitor watch

Everything you need to ship with confidence

Built for developers who want monitoring handled and out of the way.
  • Real browser checks
    Uses Playwright under the hood — catches JS errors, redirects, and anything a headless Chrome would catch.
  • Automatic retries
    Configurable retry attempts before marking a check as failed. No false alarms from flaky networks.
  • Screenshots on failure
    Automatically saves a full-page screenshot whenever a check fails. Know exactly what went wrong.
  • Multi-channel alerts
    Email, Slack, Discord, or any webhook. Get notified where your team already lives.
  • Built-in scheduler
    Run `monitor watch` and each check fires on its own interval — no cron, no external scheduler needed.
  • HTML reports
    Auto-generated report after every run. Open it in your browser, share it with your team.

Start monitoring in minutes

Install the package, define your checks, run monitor watch. That's it.
npm install @alosha/monitorView on GitHub