SSL Certificate Monitoring for IT Teams
You find out the internal portal's cert expired from the helpdesk ticket that comes in at 8am. Not from your monitoring.
It happens because monitoring setup takes time you haven't gotten to, or the tool doesn't cover every service, or someone added a subdomain that never made it onto the list.
Expiron checks SSL certs directly — no agent, no per-server configuration. Add a domain or subdomain and it reads the live certificate. Alerts go to email or Slack at 60, 30, 14, 7, and 1 day out.
It's not a replacement for full infrastructure monitoring. It's the specific piece that handles cert and domain expiry so you're not finding out the wrong way.
- Direct cert reading — no agent install, no server configuration. Add the domain, done.
- Slack integration via Incoming Webhook — alerts go to the channel your team actually monitors.
- Pro plan is unlimited domains — CSV import handles bulk onboarding of all internal and external services.
Common questions
- Does it need an agent installed on servers?
- No. Expiron reads the certificate over HTTPS directly. You add the domain and it does the rest.
- What if we have 200+ internal domains?
- Pro plan is unlimited domains. CSV import handles bulk onboarding.
- Does it work for internal domains behind VPN?
- Expiron needs to reach the domain to read the SSL cert. Publicly accessible domains work; VPN-only internal domains do not.
- Can we route alerts to a specific Slack channel?
- Yes — create an Incoming Webhook in your Slack workspace settings, paste the URL into Expiron, and choose the channel.