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mcp/harbor
Grok

Lookproof DNS and mail security checks for Grok

io.github.lookproof/lookproof-mcp

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

client:Grok transport:stdio runtime:pypi

Install Lookproof DNS and mail security checks in Grok

.mcp.json (in your project root)

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>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

Lookproof DNS and mail security checks in other clients

Lookproof DNS and mail security checks MCP server