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SSL Certificate Protection

SSL Certificate Monitoring Never Miss an Expiry

Track SSL certificates across all your client sites. Get alerted weeks before they expire so you never face a browser security warning.

clientsite.com
Status
valid
Issuer
Let's Encrypt
Valid From
Jan 10, 2026
Valid Until
Apr 10, 202631 days
shop.acmeco.com
Status
valid
Issuer
Cloudflare, Inc.
Valid From
Feb 1, 2026
Valid Until
Mar 18, 20268 days

Why SSL Monitoring?

Expired certificates destroy client trust

An expired SSL certificate triggers browser security warnings that scare visitors away, tanks your client's SEO rankings, and breaks any API integrations relying on HTTPS. For agencies managing dozens of sites, a single missed renewal can mean lost revenue and a difficult client conversation.

  • Automatic scanning of all SSL certificates
  • Configurable alert thresholds (7, 14, 30, 60, 90 days)
  • Certificate chain and issuer tracking
30d
Default Alert Window
24/7
Continuous Scanning
100%
Certificate Coverage
0
Missed Expirations

Features

Complete SSL visibility

Expiry Alerts

Get notified 7, 14, 30, 60, or 90 days before a certificate expires. Customize thresholds per monitor.

Certificate Details

See the full certificate chain, issuer, valid dates, and certificate type for every monitored domain.

Multi-Domain Coverage

Monitor SSL across all your client sites in one place. No per-certificate fees—it's included with every monitor.

Instant Notifications

Email, SMS, Slack, and webhook alerts ensure the right person knows about expiring certificates immediately.

Incident Tracking

When a certificate expires or changes unexpectedly, an incident is automatically created with full diagnostics.

Bundled with Uptime

SSL monitoring runs alongside your uptime checks. No extra configuration—just enable it when creating a monitor.

FAQ

SSL monitoring questions

How far in advance does Sentinel warn me about SSL expiry?

Sentinel alerts you weeks before a certificate expires, giving you plenty of time to renew before visitors ever see a browser security warning.

How will I be notified about an expiring certificate?

Alerts can reach you by email, SMS, Slack, Discord, and webhooks. Route them to whichever channel your team watches most closely.

Can I monitor SSL certificates for all my client sites at once?

Yes. Sentinel is built for agencies and freelancers, so you can track SSL certificates across every client site from a single account.

Does SSL monitoring replace uptime monitoring?

No, they complement each other. SSL monitoring is one of several monitor types and sub-checks alongside HTTP uptime, DNS, domain expiration, keyword, JSON/API response assertions, ICMP ping, TCP port reachability and heartbeat/cron job monitoring.

What happens if a certificate expires unexpectedly?

Sentinel keeps checking your certificates continuously, so if one expires or changes you are alerted right away rather than finding out from a client.

Is there a free trial for SSL monitoring?

Yes. Paid plans come with a 14-day free trial, there is also a free plan, and you can cancel anytime.
Protect your clients' certificates

Never let a client's SSL certificate expire

Start monitoring SSL certificates across all your client sites. 14-day free trial, cancel anytime.

Start Free Trial → View Pricing