Port Scanner API

Scan TCP ports on any host -- check open/closed status, response time. 16 common ports by default. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

config.json

{
  "mcpServers": {
    "port-scanner": {
      "url": "https://port-scanner.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

Terminal

curl -X POST "https://port-scanner.api.klymax402.com/api/scan" \
  -H "Content-Type: application/json" \
  -d '{"host":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
`network_scan_ports`	POST	`/api/scan`	$0.008	Scan common ports on a host to check which are open

`network_scan_ports`

Use this when you need to check which TCP ports are open on a host. Returns port status and response times in JSON.

Parameters

Name	Type	Required	Description
`host`	string	yes	The hostname or IP address to scan
`ports`	array	no	Array of port numbers to scan (default: [21,22,25,53,80,110,143,443,993,995,3306,3389,5432,6379,8080,8443])

Example response:

config.json

{"host":"example.com","ports":[{"port":80,"status":"open","responseTime":45},{"port":443,"status":"open","responseTime":52},{"port":22,"status":"closed","responseTime":null}],"openCount":2,"totalScanned":16,"scanDuration":1200}

When to use: server reconnaissance, verifying firewall rules, checking service availability, and infrastructure auditing.

Not for: DNS resolution (use network_lookup_dns), SSL certificate checks (use security_check_ssl), HTTP header analysis (use network_analyze_headers).

Example agent prompts

"Check which TCP ports are open on a host"

Payment

Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
Network: Base L2 (eip155:8453)
Asset: USDC
Facilitator: Coinbase CDP (primary), PayAI (fallback)
Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

Catalog: https://klymax402.com/llms.txt
Full API reference: https://klymax402.com/llms-full.txt
Live stats: https://klymax402.com/stats

License

MIT