Monitor any port, any service
Point a TCP monitor at any host and any port from 1 to 65535, and it opens a real connection on a schedule.
Databases, mail servers, SSH, game servers, message queues, custom services, anything that speaks TCP.
Not just websites
HTTP checks miss the services behind your app. A TCP port check covers everything else you run.
Connect time, not just up or down
Every check measures DNS resolution and connect time, so you see slowdowns before they become outages.
Set a timeout that matches your service, and degraded thresholds that flag slow connects early.
Catch slow before down
A port that answers in three seconds is a warning sign. Degraded thresholds surface it while users are still connected.
Checked from 26 cloud regions
Run your TCP checks from 26 cloud regions around the world.
See whether a port is unreachable everywhere or only from one part of the world, and cut through false alarms.
Your users are global
A firewall rule or routing issue can block one region while others connect fine. Multi-region checks show the difference.
Alerts where your team already works
Get notified on failure and again on recovery, so you know when an incident starts and when it ends.
Email, Slack, Microsoft Teams, webhooks, Discord, PagerDuty and Opsgenie are all built in.
No missed pages
Route alerts to chat for visibility, and to PagerDuty or Opsgenie for on-call escalation.
Part of one monitoring platform
TCP monitors live alongside uptime monitoring, DNS monitoring, status pages, dashboards and SLA reports.
Manage everything with Monitoring as Code and the MCP server, from one account and one bill.
Available on paid plans
TCP monitors are a paid-plan feature. Start free with HTTP/HTTPS uptime and API checks, then upgrade when you need port-level checks.
Works with everything that speaks TCP
If it listens on a port, LoadFocus can monitor it. Postgres, MySQL, Redis, SMTP, SSH, game servers, message queues and your own custom services.
TCP Port Monitoring FAQ
What is TCP port monitoring?
TCP port monitoring opens a real connection to a host and port on a schedule, confirming the service accepts connections and measuring how long the connect takes.
What services can I monitor?
Anything that speaks TCP: Postgres, MySQL, Redis, SMTP mail servers, SSH, game servers, message queues and custom services, on any port from 1 to 65535.
What does each check measure?
Each check measures DNS resolution and connect time, with a configurable timeout. Degraded thresholds flag slow connects before they turn into failures.
Where do the checks run from?
TCP checks run from 26 cloud regions, so you can tell a global outage from a regional network or firewall issue.
How do alerts work?
You get an alert when a check fails and another when it recovers, via email, Slack, Microsoft Teams, webhooks, Discord, PagerDuty or Opsgenie.
Is TCP monitoring free?
TCP monitors are included on paid plans. You can start free with HTTP/HTTPS uptime and API checks, then upgrade when you need port-level monitoring.
Outgrown your testing tools?
Load test websites and APIs from 25+ cloud regions, monitor page speed and uptime, and get AI analysis that explains your results in plain English.Start for free
We'll help you get started
Learn
Browse our documentation covering everything from use cases to getting started guided and videos.
Explore
Tools to make your testing development and overall experience much better.