TCP Port Scanner API

Check which ports on a host are open and what services are listening on them

Give this API a hostname or IP address and it will try connecting to each port in your requested range. For every port that answers, it tells you whether it is open or blocked, which service is likely running there (like a web server or SSH), and what software version was detected. This saves you from installing network tools, parsing messy command-line output, or writing socket loops yourself. Only scan hosts you own or have permission to scan — this tool does not check that for you.

$0.01 per request — pay via x402/USDC. No account needed.

POST a JSON body with 'target' (hostname or IP as a string) and optionally 'ports' (a range like '1-1000' or a comma-separated list like '22,80,443'), 'scan_type' (only 'tcp_connect' is supported), and 'timeout' (whole number of seconds, 5 to 60). The response includes an 'open_ports' array — each item has 'port', 'protocol', 'state', 'service', and 'version'. Use 'ports_scanned' and 'closed_or_filtered_count' for summary stats. If the target cannot be reached or resolved, you will receive a 400 error with a plain-English 'error' field. Never use this on hosts you do not own or have explicit permission to scan.

{
  "target": "scanme.nmap.org",
  "ports": "1-1000",
  "scan_type": "tcp_connect",
  "timeout": 30
}

{
  "target": "scanme.nmap.org"
}

{
  "target": "not-a-real-host-xyz123.invalid",
  "ports": "99999",
  "timeout": 5
}

{
  "target": "scanme.nmap.org",
  "ports": "1-65535",
  "scan_type": "tcp_connect",
  "timeout": 60
}

{
  "api_version": "1.0.0",
  "target": "scanme.nmap.org",
  "resolved_ip": "45.33.32.156",
  "scan_type": "tcp_connect",
  "duration_ms": 4521,
  "ports_scanned": 1000,
  "open_ports": [
    {
      "port": 22,
      "protocol": "tcp",
      "state": "open",
      "service": "ssh",
      "version": "OpenSSH 8.2p1"
    },
    {
      "port": 80,
      "protocol": "tcp",
      "state": "open",
      "service": "http",
      "version": "Apache httpd 2.4.41"
    }
  ],
  "closed_or_filtered_count": 998
}