@domainintel/mcp

An MCP server that gives AI agents live domain intelligence: WHOIS, DNS, SSL/TLS, HTTP security headers, reputation, and subdomain discovery for any domain. It is the same analysis engine that powers DomainIntel.app.

Tools

Tool	Returns
`whois_lookup`	Registrar, creation/expiry/updated dates, registrant country, privacy status, nameservers
`dns_records`	A, AAAA, MX, TXT, NS, CNAME, CAA records + SPF/DMARC presence + misconfiguration warnings
`ssl_certificate`	Validity, issuer, expiration, days remaining, protocol, warnings
`security_headers`	HSTS, CSP, X-Frame-Options and others, scored with recommendations
`domain_reputation`	DNSBL / Spamhaus blocklist checks and a reputation score
`subdomain_discovery`	Subdomains via Certificate Transparency logs and common-prefix probing
`full_domain_report`	Every analyzer at once plus an overall A+ to F security score
`analyze_email_headers`	Parses a raw email header block: SPF/DKIM/DMARC results, the Received delivery path with timing, key envelope fields, and a From-vs-Return-Path spoofing flag

Every tool except analyze_email_headers takes a single domain argument; protocol, www., and paths are stripped automatically. analyze_email_headers takes a headers string (a pasted raw header block) instead.

Requirements

Node.js 18 or newer

Install

Claude Code

claude mcp add domainintel -- npx -y @domainintel/mcp

Claude Desktop

Add to claude_desktop_config.json (Settings → Developer → Edit Config):

{
  "mcpServers": {
    "domainintel": {
      "command": "npx",
      "args": ["-y", "@domainintel/mcp"]
    }
  }
}

Any other MCP client

The server speaks MCP over stdio:

npx -y @domainintel/mcp

Example prompts

"Run a full domain report on stripe.com"
"What are the MX records for github.com, and does it have DMARC?"
"Is the SSL certificate for example.org close to expiring?"

Development

Run from source (no build needed):

git clone <repo> && cd domainintel.app
npm install
npm run mcp        # node mcp/server.mjs

Building & publishing

The published package is a single self-contained bundle (the analyzers and all JS dependencies are bundled with esbuild; Node built-ins resolve at runtime).

npm run build:mcp          # from repo root -> mcp/dist/server.mjs
cd mcp && npm publish       # prepublishOnly rebuilds the bundle

License

MIT

DomainIntel

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