TCP vs HTTP Monitoring: Which One Should You Use?

The simple distinction

HTTP monitoring checks an application-facing protocol. TCP monitoring checks whether a host and port can accept a network connection. They answer different questions, so one is not a universal replacement for the other.

Use HTTP when the user-facing experience matters

Website and API monitors are best when you care about the actual request users make: URLs, status codes, response bodies, authentication, and application latency.

Use TCP when the service does not speak HTTP

Databases, caches, SSH, and mail services may expose TCP sockets without a useful HTTP endpoint. A TCP check can verify that the service boundary is reachable even when a web monitor cannot.

Use both for layered visibility

For many production systems, the best answer is both. An HTTP check tells you whether the customer-facing path works. A TCP check tells you whether a critical infrastructure component is reachable. Comparing them makes incidents easier to diagnose.

PingStag supports both

PingStag runs HTTP/HTTPS and API checks alongside direct TCP port monitoring in the same workspace, letting teams monitor infrastructure at the layer that matches the risk.