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Lookproof DNS and mail security checks

io.github.lookproof/lookproof-mcp ยท v0.1.0

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

Website Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add lookproof-mcp -e X402_PAY=<X402_PAY> -e PRIVATE_KEY_FILE=<PRIVATE_KEY_FILE> -e PRIVATE_KEY=<PRIVATE_KEY> -e MAX_SPEND_USD=<MAX_SPEND_USD> -e PAYTO_ALLOWLIST=<PAYTO_ALLOWLIST> -- uvx lookproof-mcp==0.1.0
claude_desktop_config.json
{
  "mcpServers": {
    "lookproof-mcp": {
      "command": "uvx",
      "args": [
        "lookproof-mcp==0.1.0"
      ],
      "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>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "lookproof-mcp": {
      "command": "uvx",
      "args": [
        "lookproof-mcp==0.1.0"
      ],
      "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>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "lookproof-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "lookproof-mcp==0.1.0"
      ],
      "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>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
X402_PAY
Optional		Set to 1 to pay for calls. Without it every tool is a dry run that only reports the price.
PRIVATE_KEY_FILE
Optional		Path to a file (chmod 600) with the private key of a dedicated wallet holding a few dollars of USDC on Base
PRIVATE_KEY
Optional, secret		Private key of a dedicated wallet (alternative to PRIVATE_KEY_FILE)
MAX_SPEND_USD
Optional		Spending cap per session (one server process) in USD
PAYTO_ALLOWLIST
Optional		Optional comma-separated addresses the server may pay; a 402 asking for any other payTo is refused

Details

Package[email protected] (PYPI, stdio)
First published5 Nov 2026
Last updated5 Nov 2026
Registry nameio.github.lookproof/lookproof-mcp

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