SSL expiry alerts before certificates break trust
Monitor HTTPS certificate health and renewal deadlines across business or client websites.
Why expiry alerts matter
Expired certificates trigger browser warnings and can break integrations that rely on TLS.
Countdown to not-after
SitePuls tracks certificate end dates and can remind you before the deadline you configure.
Agency and multi-site workflows
Client sites often use different CAs and CDNs—central reminders reduce missed renewals.
Pair with website monitors
HTTP checks catch many failures; SSL monitors target the “about to expire” class early.
Alert channels
Email, Telegram, and webhooks through alert contacts—consistent with other monitor types.
Relation to domain monitoring
Domains and certificates expire on different clocks; track both where renewals are risky.
Not automatic renewal
SitePuls alerts; renewal still happens at your CA or hosting provider.
Where to start
Add an SSL monitor per hostname, attach contacts, and align reminder timing with your process.
What you can verify with SitePuls here
- Tracks certificate expiry dates and days remaining per hostname.
- Helps avoid browser trust warnings from expired HTTPS certificates.
- Useful for client and business websites managed in one workspace.
Where incident alerts can go
- Email addresses saved as alert contacts receive messages when incidents open or resolve (according to your notification settings).
- Telegram notifications via the SitePuls bot after you link a chat to an alert contact (including the bot /start flow for pending contacts).
- HTTPS webhooks that receive JSON with event type, monitor identifiers, status, timestamp, optional incident id, and a short message for generic integrations.
- Slack-compatible incoming-webhook formatting: alert contacts can use a dedicated mode so payloads match Slack-style incoming webhook expectations.
Practical monitoring guide
Example content below is illustrative — values are placeholders, not live customer data.
What to monitor first
- Primary domain and apex hostnames customers type in the browser.
- API and app subdomains that terminate TLS.
- Client domains you manage as an agency or MSP.
Renewal workflow
- Set expiry reminders with enough lead time for your CA or host.
- Track subdomains separately — they often use different certificates.
- Confirm alerts reach whoever can approve DNS or hosting changes.
Common mistakes
- Relying only on registrar or CA email reminders.
- Forgetting wildcard or CDN-managed certificates.
- No owner when the person who installed the cert leaves the team.
Frequently asked questions
Why do SSL expiry alerts matter?
Expired certificates can break user trust, cause browser warnings and interrupt important services.
Can agencies monitor client SSL certificates?
Yes. Agencies can track certificate expiry across client websites to avoid missed renewals.
Can SSL monitoring reduce downtime risk?
Yes. Earlier certificate alerts give teams time to renew before HTTPS issues affect users.
Let's Encrypt short-lived certs?
The countdown follows the actual not-after date presented for the hostname.
Different from /ssl-monitoring?
Same SSL monitor capability—this page targets expiry-alert search intent.
Notification channels?
Email, Telegram, and webhooks via alert contacts.
Wildcard certificates?
Add monitors for hostnames as you need visibility on each connection.
How do I add a monitor?
Create an SSL monitor for the hostname and attach alert contacts.