Is it down?
Know before your users do.
Instant status, latency, SSL-expiry, and header checks for any URL — plus scheduled uptime monitors and a public status page. Checks run from the edge, close to your servers.
Website Status Checker
Check any URL from the edge: status, response time, redirects, headers.
🌐DNS Lookup
Resolve any domain's DNS records from the edge.
📈Uptime Monitor
Schedule checks, track history, and publish a status page.
🧾HTTP Header Inspector
Inspect response headers and grade security best practices.
Why UpNimbus
Traditional uptime monitoring means servers, agents, and a bill that scales with your check frequency. UpNimbus runs checks on Cloudflare’s edge network on a cron schedule, so global monitoring costs almost nothing and starts in one click.
Start with instant one-shot checks — status code, response time, SSL certificate expiry, and full headers — then add scheduled monitors that remember their history and drive a public, KV-cached status page that stays up even when your app is down.
Part of the Nimbus Suite
A family of focused, browser-first tools. Each one does a single job well.