Simple, honest pricing
Checking any domain is free forever, no signup. Pro exists for teams that need continuous monitoring across many domains — it keeps the service running.
Free
Everything you need for a handful of domains
$0
- Up to 3 monitored domains
- Email expiry alerts at 30 / 14 / 7 / 1 days
- Weekly automatic re-scans
- Unlimited public domain checks
- Full AI assistant access (MCP)
Pro
Continuous monitoring across your whole estate
$12/month
- Up to 25 monitored domains
- Everything in Free
- Slack and generic webhook alerts
- Daily re-scans with grade-change notifications
- Priority in the scan queue
Works inside your AI assistant
47DayCerts ships an MCP server, so Claude, ChatGPT, and Claude Code can check certificates and manage your monitored domains conversationally — no dashboard required.
Five available tools
check_certificateCheck any domain's live certificate.list_monitored_domainsList the domains you monitor.add_monitored_domainAdd a monitored domain.remove_monitored_domainRemove a monitored domain.list_certificate_notificationsList recent expiry notifications.
Connection URL
https://47daycerts.com/mcpAdd it as a connector, sign in once, and approve access.
You: Which of my certificates expire in the next 30 days?
Assistant: Two of your three monitored domains renew soon — shop.example.com expires in 12 days (Let's Encrypt R11) and api.example.com in 26 days (Google WE1). Both are ACME-automated, so no manual action is needed.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Public domain checks | Unlimited, no signup | Unlimited, no signup |
| Monitored domains | 3 | 25 |
| Email expiry alerts | 30 / 14 / 7 / 1 days | 30 / 14 / 7 / 1 days |
| Automatic re-scans | Weekly | Daily |
| AI assistant access (MCP) | ||
| Certificate checks via MCP | Unlimited | Unlimited |
| Monitored domains manageable via MCP | 3 | 25 |
| Grade-change notifications | ||
| Slack webhook alerts | ||
| Generic webhook alerts | ||
| Priority in the scan queue | ||
| Readiness scores & PDF reports |
AI assistant access over MCP is included for everyone — your plan only governs how many domains it can manage. Certificate checks through MCP are always unlimited.
Cancel anytime from the billing portal. On cancellation you keep Pro until the end of the paid period, then return to Free limits — nothing is ever deleted. If you were monitoring more than 3 domains, the 3 most recently added stay active and the rest are paused until you upgrade again.
Questions people ask
Certificate lifetimes drop to 100 days on March 15, 2027 and 47 days on March 15, 2029. Manual renewal stops being viable well before then — .