---
type: Monitoring Feature
title: "SSL/TLS Certificate Monitoring and Reminders | ostr.io"
description: "Detect SSL/TLS certificate changes and receive expiration reminders with free ostr.io WebSec monitoring, so renewals happen before customers ever notice."
resource: "https://domain-protection.info/ssl-certificate-monitoring/"
tags: [SSL certificate monitoring, ostr-io]
timestamp: 2026-05-27T00:00:00Z
---

# Watch certificate changes and renew before customers notice

Detect SSL/TLS certificate changes and receive expiration reminders with free ostr.io WebSec monitoring, so renewals happen before customers ever notice.

## Read the full page

[Watch certificate changes and renew before customers notice](https://domain-protection.info/ssl-certificate-monitoring/) on domain-protection.info.

## Verified claims

- ostr.io WebSec monitors WHOIS, DNS, and SSL/TLS records and can alert on detected changes. (source: https://ostr.io/info/domain-names-protection, accessed 2026-05-27)
- WebSec sends reminders for domain-name and SSL/TLS certificate expiration. (source: https://ostr.io/info/domain-names-protection, accessed 2026-05-27)

## Related concepts

- [Monitor the website signals that tell you to investigate](/website-monitoring.md)
- [Know when your domain records change](/domain-monitoring.md)
- [Detect DNS record changes and validate them fast](/dns-monitoring.md)
- [Get renewal reminders before a domain is due](/domain-expiration-monitoring.md)
- [Send alerts to people who can act](/alerts.md)
- [How to respond to an SSL expiration alert](/guides/respond-to-ssl-expiration-alert.md)

## Source

Generated from domain-protection.info page metadata and a dated ostr.io evidence ledger (verified 2026-05-27). This site describes monitoring, detection, alerts, and reminders only. Claims about ostr.io are limited to the cited public pages, are not confirmed beyond them, and should be re-checked against the current ostr.io interface before reuse.