Cassian Sentinel™ · Uptime & Domain Health

Your domain expires in 14 days. Your store vanishes.

Checks your store is online every few minutes, and warns you before your SSL or domain expires.

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What it checks

HTTP health checks every 1–5 minutes
Confirm-before-alert — 30s retry on failure
SSL certificate expiry countdown and alerts
Domain registration expiry monitoring
Response time tracking and trends
Downtime duration tracking

What you don't know

Domain registrations lapse quietly. Your entire store disappears.

Auto-renewal fails because the card on file expired. Your SSL certificate lapses and browsers show a scary warning. Your entire store disappears — and if someone else grabs the domain, you're starting over.

Cassian Sentinel™ watches your domain expiry, SSL certificate, response times, and uptime. The things you forget about until they take your store offline at 2am on a Saturday.

How Cassian™ detects this

Cassian Sentinel™ sends HTTP health checks every 1–5 minutes (tier-dependent). On failure, it waits 30 seconds and retries before alerting — no false positives. TLS certificate expiry is inspected via direct connection. Domain registration expiry is checked daily. Response times are tracked for trend analysis.

With Cassian™

  • HTTP checks every 1–5 minutes (tier-based)
  • 30-day advance warning on domain and SSL expiry
  • Confirm-before-alert — retries before notifying
  • Response time tracking catches slow degradation

Without monitoring

  • Domain expiry surprises you at the worst time
  • SSL certificate lapses trigger browser warnings
  • Downtime discovered by customers, not monitoring
  • No response time trends to catch degradation

Plan access

Protector+: 5-minute checks. Prime/Enterprise: 1-minute checks. Not available on Inspector or Analyst.

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See it for yourself.

Enter your store URL and get your first scan in minutes. Free, no credit card, no commitment.

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No credit card · Results in minutes · Free forever plan