New: free SPF, DKIM, DMARC and security-header checkers Browse free tools →
NetworkAI
  • 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 CheckSSL, DNS, email authentication, security headers and expiry in one scored report.Run a 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
DNS
  • DNS Lookup
  • MX Lookup
  • CAA Record Checker
  • DNS Propagation Checker
  • TXT Record Lookup
  • NS Lookup
  • CNAME Lookup
  • Reverse DNS Lookup
Email authentication
  • SPF Record Checker
  • SPF Record Generator
  • DMARC Record Checker
  • DMARC Record Generator
  • DKIM Record Checker
  • Email Sender Requirements Checker
Website security
  • Security Headers Checker
Network & IP
  • What Is My IP Address
  • Subnet Calculator
All free tools →
PricingDocsGuides
Log inStart free
  • 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
DNS
  • DNS Lookup
  • MX Lookup
  • CAA Record Checker
  • DNS Propagation Checker
  • TXT Record Lookup
  • NS Lookup
  • CNAME Lookup
  • Reverse DNS Lookup
Email authentication
  • SPF Record Checker
  • SPF Record Generator
  • DMARC Record Checker
  • DMARC Record Generator
  • DKIM Record Checker
  • Email Sender Requirements Checker
Website security
  • Security Headers Checker
Network & IP
  • What Is My IP Address
  • Subnet Calculator
All free tools →
PricingDocsGuides
Start freeLog in
Cert lifetimes are now 200 days — 47 by 2029

Know before a certificate fails to renew — not after it's expired.

NetworkAI watches your TLS certificates, domain registrations, and DNS records, and pages you the moment a renewal actually goes wrong — not on a fixed day count that fires every cycle.

Monitor your first domain — free
✓ 5 domains free✓ No credit card✓ 2-minute setup
WATCHLIST · 4 DOMAINS1 NEEDS ATTENTION
api.northwind.iorenews in 61 days · issuer: Let's Encrypt
app.northwind.iorenews in 12 days · auto-renew pending
checkout.northwind.iorenewal failed — 3 days to expiry
northwind.iodomain expiry: 340 days · DNS OK

Example data

READ-ONLY CHECKS · NOTHING TO INSTALL · DETERMINISTIC TLS, RDAP & DNS LOOKUPS
THE 47-DAY PROBLEM

Six renewals. One of them failed. Which alert told you?

The same six 47-day certificate cycles, seen through a fixed reminder and through renewal-failure detection.

Fixed 30-day reminder6 alerts — 5 of them noise
!
!
!
!
!
!
NetworkAI renewal-failure alerts1 failed renewal — 3 alerts, all real
✓
✓
✓
✓
✓
✓ Renewed Renewal point 7 days · 1 dayRenewal failed

Illustrative timeline: six consecutive 47-day certificates; the sixth fails to renew.

THE DIFFERENCE

A reminder fires on a schedule. An alert should fire on a failure.

Fixed 30-day reminder

  • Fires on nearly every renewal cycle once certificates reach 47 days
  • Trains the team to dismiss it — until the one time it was real
  • Says nothing about whether the renewal actually happened

NetworkAI renewal-failure alert

  • Fires only when a certificate passes its renewal point with no replacement
  • Always alerts at 7 days and 1 day, so a silent failure still surfaces
  • A successful renewal resets the state — the next cycle starts clean
WHY TEAMS SWITCH TO NETWORKAI

Built for the 47-day certificate world, not the 398-day one.

Renewal-failure detection

We alert when a cert hasn't renewed by its expected point in its lifecycle — not on a fixed day count that fires every 100-day cycle and trains you to ignore it.

api.example.comOK · 61d
app.example.comRENEWING · 12d
shop.example.comRENEWAL FAILED

Full-chain TLS checks

Expiry, chain completeness, hostname/SNI mismatch and issuer changes — read straight off the handshake, daily, per domain.

Leaf
Intermediate
Root

Domain + DNS in one place

RDAP-based registration expiry and key DNS record checks (A/CNAME/MX), so a lapsed domain never blindsides you either.

✓RDAP✓A✓CNAME✓MX✓CRL
HOW IT WORKS

From first domain to first alert in minutes

  1. 01

    Add your domains

    Type a hostname or import a CSV. Nothing to install on your servers.

  2. 02

    We check every day

    TLS certificate, chain, revocation, domain registration and DNS records — read-only.

  3. 03

    Get alerted on failure

    Email on every plan; Slack and signed webhooks on Pro.

FREE TOOLS

Try the checks before you sign up

All free tools →

SSL certificate checker

Expiry, chain completeness, hostname match, revocation status and key strength for any public hostname.

RDAP domain lookup

Registration and expiry dates, registrar, status and nameservers — straight from the registry, with a WHOIS fallback.

Certificate lifetime readiness

See how a certificate's lifetime compares with the 200-, 100- and 47-day limits arriving by 2029.

ALERT CHANNELS

Alerts where your team already looks

Email

Included on every plan, including Free.

Slack

Post to a channel through an incoming webhook. Pro.

Signed webhooks

HMAC-signed JSON to your own endpoint, with retries. Pro.

Read the alert docs →
PRICING

One subscription. Every current and future tool.

No per-tool pricing, ever.

Free
$0
Up to 5 domains, forever
✓ Daily cert + domain checks✓ Renewal-failure alerts by email✓ Manual recheck✗ Slack / webhook alerts✗ Client grouping
Start free
ProMOST POPULAR
$19/mo
Up to 50 domains
✓ Everything in Free✓ 1 security assessment report a month✓ Slack & webhook alerts✓ CSV bulk import✓ Priority checks✓ Client grouping & tags
Start Pro trial
Team
$49/mo
Up to 250 domains
✓ Everything in Pro✓ Multi-user & roles✓ White-label client reports✓ Priority support
Talk to us
FAQ

Common questions

A fixed reminder fires whether or not your renewal is working. NetworkAI alerts when a renewal that should have happened hasn't, so an alert means something needs attention.
Port 443 by default; the port is stored per domain.
No. The checks are deterministic TLS handshakes, RDAP/WHOIS lookups and DNS queries. It is also read-only: it never changes anything on your domains.
Existing monitored domains are never dropped silently — you're prompted before new checks stop.

Add your first domain in under two minutes

5 domains free. No credit card.

Start free
NetworkAI

Renewal-failure alerts for TLS certificates and domain registrations.

Product

  • Certificate monitor
  • Pricing
  • Log in
  • Start free

Free tools

  • Domain Health Check
  • SSL Certificate Checker
  • SPF Record Checker
  • DMARC Record Checker
  • Security Headers Checker
  • DNS Lookup
  • All free tools →

Tool categories

  • Domain
  • SSL / TLS
  • DNS
  • Email authentication
  • Website security
  • Network & IP

Resources

  • Documentation
  • Slack & webhook alerts
  • Guides
  • All comparisons
  • NetworkAI vs UptimeRobot
© 2026 NetworkAI · Built by a network security engineer
PrivacyTerms
EspañolالعربيةDeutsch