NTP Monitoring for Time Servers That Can't Drift
Certificates, logs, auth tokens, cron jobs, financial records — they all quietly depend on correct time. WatchFor queries your NTP servers from around the world, measures their sync quality — offset, jitter, stratum — and alerts you when a server stops responding or starts drifting.
Everything you need to trust your clocks
Purpose-built checks for Network Time Protocol services.
Real NTP queries
Every check sends genuine NTP requests — multiple samples per check — and validates the responses. A server that's up but answering garbage is caught immediately.
Offset & jitter measurement
Each check measures clock offset and jitter against the server, so you can alert on drift itself — not just on downtime.
Stratum & sync validation
Stratum level and leap/unsynchronized flags are checked on every query — a server that lost its own upstream sync is flagged before it spreads bad time.
Response-time tracking
See how quickly each time server answers over time, and spot creeping slowness before clients start timing out.
Multi-region checks
Query your NTP servers from several locations worldwide, so a routing issue in one region is never mistaken for a dead server.
Public pool or private servers
Monitor pool.ntp.org members, your ISP's time service, or the internal NTP servers your infrastructure syncs against.
Confirmed alerts
A failure is verified from multiple regions before an incident opens, so you're paged for real outages, not blips.
Uptime history & SLA
Availability history and response-time trends for every time server, ready for audits and internal SLAs.
Why monitor NTP at all?
Time is the dependency nobody thinks about until it breaks. When clocks drift or a time server dies, TLS handshakes fail, Kerberos and MFA logins get rejected, distributed databases disagree, and log timelines become useless for debugging. NTP monitoring keeps the failure visible long before those symptoms appear.
Catch dead or misbehaving time servers before clock drift spreads
Alert on offset, jitter and stratum — sync quality, not just uptime
Protect TLS, Kerberos and MFA flows that reject skewed clocks
Keep log timestamps trustworthy for debugging and forensics
Monitor both public pools and internal NTP infrastructure
Verify real NTP responses, not just server reachability
Response-time trends from multiple regions worldwide
Alerts to Slack, PagerDuty, email and 20+ other channels
Uptime history for compliance and capacity planning
How NTP monitoring works
From setup to alert in a couple of minutes.
Add your time server
Enter the hostname or IP of any NTP server — a pool member, your provider's, or an internal one reachable from the internet.
We query it on schedule
WatchFor sends real NTP requests at the interval you choose and validates that a well-formed time response comes back.
Failures get confirmed
If a query fails, additional regions re-check immediately — only a confirmed failure opens an incident.
You get alerted with detail
The alert tells you which server, from where, and since when — with response-time history to back it up.
Who needs NTP monitoring
Anywhere correct time is quietly load-bearing.
Infrastructure & platform teams
Fleets of servers sync against internal NTP. If it dies silently, drift accumulates until TLS and auth start failing in confusing ways. Monitoring turns that slow-motion outage into an immediate, obvious alert.
Financial and regulated systems
Trading, payments and audit systems have strict timestamp accuracy requirements. Keep evidence that your time sources were up, responsive and monitored around the clock.
NTP pool and ISP operators
If you serve time to others, downtime is public. Independent multi-region monitoring shows your servers as your users see them, not as your LAN sees them.
Security-sensitive environments
Kerberos, MFA and certificate validation all reject skewed clocks. Monitoring the time source removes a whole class of 'nobody can log in' mysteries.
NTP monitoring FAQ
Common questions about monitoring time servers.
Put your time servers under watch
Add an NTP monitor in under a minute — free plan, no credit card required.