WatchAny TCP port
Monitor databases (5432, 3306), mail (25, 465, 993), SSH, message queues or any custom service by host and port.
Port monitoring
TCP port monitoring for any service
Not everything speaks HTTP. WatchControl opens a TCP connection to the port you choose — 443, 5432, 25, or any custom port — and alerts you when it stops accepting connections.
Connection checks
We confirm the port actually accepts a TCP connection — not just that the host pings — so you catch a dead service on a live box.
Checks every minute
From 5-minute checks on Free down to every minute on Pro and Business, with failure confirmation.
Instant alerts
Email and webhook on every plan, plus SMS, routed to the tools your team already uses.
FAQ
Frequently asked questions
What can TCP port monitoring check?
Any TCP service — databases, mail servers, custom services — by confirming the exact port accepts connections.
Does it check the application or just the port?
It confirms the port is open and accepting TCP connections; for protocol-level checks like SMTP or HTTP, use the matching monitor type.
How fast are checks?
From every 5 minutes on the free plan and as fast as every minute on paid plans.
Is port monitoring free?
Yes — TCP port is one of the nine monitor types on every plan.
Monitor a port free
Add a host and port and get alerts in minutes — no credit card.