Website monitoring that goes beyond 200 OK

Sitewatch goes beyond uptime. It fetches your page, parses the HTML, and validates every linked asset -- checking HTTP status codes and MIME content types. It also SHA-256 fingerprints your page HTML to detect structural changes. You get alerted when assets go missing, serve the wrong content type, or when your page structure changes unexpectedly.

Uptime monitors ping your server and check for a 200 status code. That tells you the server is running -- nothing more. Sitewatch checks what actually loads on the page. A broken JavaScript bundle, a stylesheet returning a 404, a script served with the wrong MIME type -- these all happen while your server returns 200 OK. Uptime tools see green. Your users see a broken page.

Sitewatch runs 20 detection rules: missing assets (404s on scripts, stylesheets, images), MIME type mismatches, redirect loops, host drift, non-HTML pages, unavailable sites, slow responses, API errors, broken links, SSL certificate expiry and chain errors, deprecated TLS protocols, weak ciphers, domain registration expiry, page-weight bloat, and performance baseline regressions — failure types uptime tools are architecturally blind to.

Check frequency is configurable per site. Free plans check every 30 minutes, Pro plans as often as every 5 minutes. On-demand checks are available anytime from the dashboard or via deploy hooks -- useful after deploys, DNS changes, or CDN updates.

Sign up for a free account (no credit card required), paste in the URLs you want to monitor, and Sitewatch runs its first website check immediately. Connect your preferred alert channels and you're fully set up in under two minutes. The free plan covers 1 site with 7 days of data retention.