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mcp/harbor
Cursor

Lookproof DNS and mail security checks for Cursor

io.github.lookproof/lookproof-mcp

SPF, DKIM, DMARC, MTA-STS, DNSSEC, TLS and DNS checks for domains, paid per call in USDC (x402)

client:Cursor transport:stdio runtime:pypi

Install Lookproof DNS and mail security checks in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "lookproof-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "lookproof-mcp"
      ],
      "env": {
        "X402_PAY": "<X402_PAY>",
        "PRIVATE_KEY_FILE": "<PRIVATE_KEY_FILE>",
        "PRIVATE_KEY": "<PRIVATE_KEY>",
        "MAX_SPEND_USD": "<MAX_SPEND_USD>",
        "PAYTO_ALLOWLIST": "<PAYTO_ALLOWLIST>"
      }
    }
  }
}

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs

Lookproof DNS and mail security checks in other clients

Lookproof DNS and mail security checks MCP server