Certificate Transparency
Detect new certs for your domains (including wildcards). Filter by patterns, issuer, SANs, key algo, precerts, and rate spikes.
- CT log monitor + alert rules
- Certificate details & timelines
- Easy “what changed?” views
Monitor domains via CT logs, RDAP and DNS
Domain-first security monitoring that actually catches changes.
Track newly issued certificates, WHOIS/RDAP changes, and DNS drift. Configure alert rules, keep a clean history, and automate via API — without paying “enterprise brand-risk” pricing.
3
Modules
Alerts
Rules & templates
API
Integrate into your stack
Live
Recent activity
Everything you need to watch domains like an adult
Three modules, one UI, consistent alerting & history.
RDAP / WHOIS
Daily RDAP snapshots with history and diffs. Get notified when registration, contacts, nameservers, or expiry data changes.
- Snapshot history
- Structured diffs
- Alerts on change types
DNS Watcher
Track DNS records over time (A/AAAA/CNAME/TXT/MX/CAA/NS…). Catch unauthorized changes and drift between environments.
- Record history
- Diffs per RRtype
- Alert thresholds
Alerts that don’t spam
Build templates and rules: severity, conditions, routing, and dedupe. Track delivery status.
How it works
Two minutes to get from “huh?” to “alert received”.
1
Add domains
Pick modules per domain: CT, RDAP, DNS. Start with one and expand.
2
Create templates
Define routing and formatting (email/webhook, etc.). Reuse everywhere.
3
Write alert rules
Match on patterns and change types. Assign severity and dedupe windows.
4
Review diffs & history
Every change is stored. Compare snapshots and export via API.
API-first (optional)
Pull alerts, snapshots, and diffs into your own automation. If you prefer a UI: ignore the API, enjoy the UI.
GET /api/v1/domains
GET /api/v1/ct/alerts?domain=example.com
GET /api/v1/rdap/history?domain=example.com
GET /api/v1/dns/diff?domain=example.com&from=...&to=...What you’ll see in the app
Replace these placeholders with your screenshots. Keep filenames and just drop images into ./assets/.
Tip: Export your app screenshots at ~1600–2200 px wide for crispness on Retina displays.
Pricing
Simple limits. No sales calls. Cancel anytime.
Free
$0/month
- 1 domain per module (CT, RDAP, DNS)
- 1 alert template
- Up to 5 alert rules
- History & diffs
- API access
Most popular
Pro
$100/month
Billed monthly (USD).
- 100 domains per module (CT, RDAP, DNS)
- 5 alert templates
- Up to 25 alert rules
- Priority processing
- API access
Enterprise?
If you need multi-org management, SSO, or larger limits, you can still run this approach internally — or talk to your friendly local security engineer (you). 😉
- Domain-focused use-cases
- Competitor monitoring
- Audit-friendly history
FAQ
The stuff people ask before they hit “Start free”.
What exactly do you monitor?
Certificate Transparency logs (new certificates), RDAP snapshots (registration/WHOIS-like data), and DNS records over time. Each module has rules + alerts + history.
Can I monitor competitor domains?
Yep — everything here uses public signals (CT logs, RDAP, DNS). It’s domain-based rather than brand-based.
Do you support webhooks / integrations?
The landing page assumes templates can route to email/webhook; wire it to whatever you support today. Swap the text to match your current implementation.
Is there an API?
Yes. The UI works fine on its own, but the API is there if you want to feed a SIEM/SOAR pipeline or custom tooling.
Ready to monitor your first domain?
Spin up a free tier account and you’ll be receiving alerts in minutes.