# Open port checker API

`POST https://itbrothers.lt/files/port-check.php`

This endpoint checks TCP reachability from the IT BROLIAI server to the public IP address of the calling connection. It does not accept a target host, does not authenticate users, and does not retain results.

Send JSON with a `ports` array containing one to seven integer TCP ports from 1 to 65535.

```json
{"ports":[443]}
```

The response contains the caller's public IP and one result per requested port with `open`, `status`, and `durationMs` fields. Use only with the network owner's knowledge.