Port Scanner

MCP Server x402 License: MIT

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.):

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

Quickstart -- HTTP (x402)

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:

{"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