Early warnings
Checks fail when a certificate is within 30 days of expiry, which leaves time for renewal and change approval.
SSL monitoring
SSL certificate monitoring before expiry becomes an outage
Expired certificates cause some of the most avoidable outages. Get warned well before any customer-facing certificate lapses.
- 01Warnings 30 days before expiry
- 02Every hostname, including API and CDN subdomains
- 03Alerts in Slack, Teams, Discord, email and SMS
- 04Alongside uptime, API and DNS checks
Direct answer
SSL certificate monitoring connects to each hostname, reads the certificate and warns before it expires. PingAlert SSL checks flag certificates within 30 days of expiry and alert through the same channels as your uptime checks, so renewals happen on a weekday, not during an incident.
Never learn about an expired certificate from a customer
Every hostname
Monitor API, CDN, image and checkout subdomains, not only the main site, since any of them can break a page.
Handshake errors
A failed TLS handshake or missing certificate alerts immediately.
One place for reliability
SSL checks sit next to uptime, API, multi-step and DNS checks with the same alert routing and incidents.
Agency friendly
Track certificates per client workspace so renewals for each client are visible to the right team.
Peak season safety
Renew before code freezes and holiday peaks; expiry warnings make the renewal a planned change.
How it works
Get set up in an afternoon
- 01
Inventory hostnames
List every hostname customers and integrations touch.
- 02
Add SSL checks
Create a check per hostname and route alerts to the owning team.
- 03
Record owners
Note who renews each certificate and how.
- 04
Renew early
Treat the 30-day warning as the renewal deadline.
- Website and API Monitoring: What to Monitor FirstA lean priority checklist for website and API uptime monitoring so small teams can detect real outages early without noisy over-monitoring.
- Third-Party Outages at Peak: Holiday ReadinessPrepare for payment, DNS, CDN and cloud provider outages before Black Friday: map dependencies, test fallbacks and audit expiring credentials.
- Why SMBs Leave Website Monitoring ToolsResearch on why small businesses abandon website monitoring tools: setup friction and missing actionable diagnostics, not the uptime check itself.
- Uptime Monitoring Without Alert FatigueA playbook for small and lean SaaS teams: monitor what customers feel, confirm failures before paging, route by severity and run a simple alert runbook.
Direct answers
Questions teams ask
How early does PingAlert warn about SSL expiry?
SSL checks fail and alert when a certificate is within 30 days of expiry.
Do I need a separate check for each subdomain?
Yes. Certificates are per hostname or SAN set, so add a check for each customer-facing hostname you depend on.
Does SSL monitoring replace uptime monitoring?
No. It covers certificate health; combine it with uptime, API and DNS checks for full coverage.