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mcp/harbor
Claude Desktop

Lookproof DNS and mail security checks for Claude Desktop

io.github.lookproof/lookproof-mcp

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

client:Claude Desktop transport:stdio runtime:pypi

Install Lookproof DNS and mail security checks in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

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

{
  "mcpServers": {
    "lookproof-mcp": {
      "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>"
      }
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs

Lookproof DNS and mail security checks in other clients

Lookproof DNS and mail security checks MCP server