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  • MonitoringCertificate & Domain MonitorDaily checks of TLS certificates, domain registration and DNS, with alerts when a renewal fails.
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  • MonitoringCertificate & Domain MonitorDaily checks of TLS certificates, domain registration and DNS, with alerts when a renewal fails.
  • AssessmentSecurity AssessmentA passive security report for a domain you own: TLS, DNS, email authentication, headers and registration.
Free tools
Start hereDomain Health Check
Domain
  • Bulk Domain Expiry Checker
  • RDAP Domain Lookup
  • WHOIS Lookup
SSL / TLS
  • SSL Certificate Checker
  • Bulk SSL Expiry Checker
  • 47-Day Certificate Lifetime Calculator
  • Certificate Lifetime Readiness
  • Post-Quantum TLS Checker
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  • Overview
  • Getting started
  • How alerts work
  • Check results & statuses
  • CSV import
  • Slack & webhook alerts

Getting started

NetworkAI checks the TLS certificate, domain registration and DNS of each hostname you add, once a day, and alerts you when a certificate renewal has failed. Setup takes about two minutes.

1. Create an account

Sign up with email and password, or with Google or GitHub. The Free plan monitors up to 5 domains with email alerts and needs no card. Pro raises the limit to 50 and adds Slack, webhooks, more email recipients and extra early warnings; see pricing.

2. Add your first domain

Onboarding asks for a hostname, such as app.example.com. You can paste a full URL; the scheme and path are removed. NetworkAI runs a first check right away and shows the result, then checks the host every day.

  • Add each hostname that serves its own certificate: example.com, www.example.com and api.example.com are separate entries.
  • The form checks port 443. To watch a service on another port, use CSV import with a port column.
  • Private and internal addresses are refused: checks run from the public internet, like your visitors.

3. Choose where alerts go

The second onboarding step shows the address email alerts go to. Change it, or add recipients, in Settings; Free sends to one address and Pro to several, with CC and BCC. On Pro you can also send alerts to a Slack channel or your own HTTPS endpoint; see Slack & webhook alerts.

You will not get a reminder on every renewal cycle. Alerts fire when a certificate has missed its expected renewal, plus a safety net 7 days and 1 day before expiry. How alerts work explains the rules.

What is checked every day

CheckWhat it readsDetails
TLS certificateExpiry, issuer, chain, hostname match, revocation (OCSP/CRL), key and signature algorithmCheck results
Domain registrationRegistration expiry date from the registry over RDAP, with WHOIS fallbackShown on the dashboard
DNSWhether the hostname has an A, CNAME or MX recordShown on the dashboard

Press Recheck on any row to run the checks again at once, for example right after you deploy a renewed certificate. Remove a domain from the same row to stop monitoring it.

Try it without an account

The same certificate check runs in the free SSL checker, and the Domain Health Check adds DNS and email authentication. Neither needs an account.

Last updated 2026-11-05

NetworkAI

Renewal-failure alerts for TLS certificates and domain registrations.

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