Know before it breaks. Certificates, domains, uptime — for everything you're responsible for.
HostNag watches your websites, APIs, gateways and mail servers, plus the certificates and domains under them, and tells the right people — by email, Slack, Discord, webhook, SMS or PagerDuty — before customers notice.
- api.acme.devHTTPUp · 142 ms
- vpn.office.exampleTCPUp
- mail.example.comCertificateexpires in 12 days
- example.comDomainexpires in 41 days
Sample data — the strip shows the next 90 days of expiries; the list shows everything being watched, colour is how urgent it is.
What gets watched
HTTP/HTTPS endpoints (status, keyword, latency) · TCP ports (VPNs, gateways, mail, databases) · DNS records · TLS certificates (expiry, changes, validity) · Domain registrations.
How you get nagged
Thresholds per group — 30, 14, 7, 3, 1 days by default — each fired once per certificate, then daily inside the final window. A recovery notice when the renewal lands, and one when checks fail. Down is confirmed — by a second location or a second run — before anyone is paged.
Built for teams that own infrastructure
One organization, a group per client, product or office, channels routed per group, and teammates with viewer, member or admin roles. Works for an agency's fifty clients and for your own five hosts.