Enter its address and confirm you’re allowed to monitor it.
Pick a plan, verify your email and set who receives alerts.
Check your dashboard, or wait for an issue and a recovery alert.
Availability: whether your page responds successfully, checked every 5 minutes. A failure is re-checked and only confirmed after two failures in a row. It does not prove every page or checkout works.
SSL: certificate validity and expiry, with warnings at 30, 14 and 7 days, plus whether plain http:// redirects to https://.
Email & DNS (Plus and Business): MX, SPF, DKIM (common selectors only), DMARC, MTA-STS and TLS-RPT, a live SMTP connection and encryption test of your mail servers, reverse DNS, nameservers, CAA, mail-server blacklist status and domain expiry, checked daily. Advice-only findings (such as a missing CAA or MTA-STS record) are shown as advice and never trigger an alert.
Limits: checks run from one location, so a problem seen only from elsewhere may not appear. Email checks read public DNS records; they do not send test messages.