Sentinel
Website Monitoring Built for Agencies
Sentinel launched on April 1, 2026.
What it does
Monitor your entire client portfolio — uptime, SSL, DNS — from one dashboard. Instant alerts via Slack, email, and SMS. Built for agencies and developers managing 5 to 300+ sites.
Uptime, SSL, DNS, and domain expiry monitoring for every client site you
Uptime, SSL, DNS, and domain expiry for every client site you're responsible for. Try it now: type a URL and Sentinel checks it live from 4 regions on three continents. 25 free checks a day, no account needed. We respect robots.txt. The worst way to learn a client's site is down is from the client. Sentinel gets to you first, with the fix already underway. Clients check uptime themselves instead of emailing you at 7am. Proof that the retainer is working, delivered without you lifting a finger. What broke, when, and what fixed it: ready to paste into the client update. Developers and account managers see what they need, and nothing they don't. Uptime is just the loudest failure. Sentinel…from sentinel.rootstuff.io
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Sentinel | Uptime MonitoringApr 2026 · senti.solutionsMonitoring that beats your customers to the punch
Sentinel - API Healthcheck Monitor 2024 · github.com · ▲12API Uptime - Monitor, Measure, Export. Anywhere
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