Domain & Company Intel MCP

Official5 toolsLive

by selflabbs · JavaScript

Domain intel for AI agents: RDAP registration, DNS, email deliverability, tech stack.

Captured live from the server via tools/list.

domain_intel

Registration intelligence for a domain via RDAP (the modern WHOIS). Returns registrar, creation/expiration/last-changed dates, domain age in years, EPP status codes, nameservers, DNSSEC state, and abuse contact. Use to vet a company, assess a lead, or judge how established a domain is.

Parameters1

domain

string

required

Domain name, e.g. stripe.com (no scheme)

Raw schema

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain name, e.g. stripe.com (no scheme)"
    }
  },
  "required": [
    "domain"
  ]
}

dns_lookup

Look up DNS records for a domain via Cloudflare DNS-over-HTTPS. Returns A, AAAA, MX, NS, TXT, CNAME, and SOA records. Use to see where a domain is hosted, who runs its mail and DNS, and what verification/policy TXT records it publishes.

Parameters2

domain	string	required	Domain name, e.g. stripe.com
types	array	optional	Optional subset of record types, e.g. ["MX","TXT"]. Defaults to all common types.

Raw schema

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain name, e.g. stripe.com"
    },
    "types": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Optional subset of record types, e.g. [\"MX\",\"TXT\"]. Defaults to all common types."
    }
  },
  "required": [
    "domain"
  ]
}

email_deliverability

Assess whether a domain (or the domain of an email address) can receive mail and how strong its sender authentication is. Returns MX presence, SPF and DMARC policy, whether it's a free consumer provider (gmail, etc.) or a known disposable/temp-mail provider, and an overall verdict. Use to qualify leads and flag throwaway signups.

Parameters1

domain_or_email

string

required

A domain (stripe.com) or an email address (a@stripe.com)

Raw schema

{
  "type": "object",
  "properties": {
    "domain_or_email": {
      "type": "string",
      "description": "A domain (stripe.com) or an email address (a@stripe.com)"
    }
  },
  "required": [
    "domain_or_email"
  ]
}

tech_stack

Fingerprint the technology behind a website by fetching its homepage. Detects web server, CMS/framework (WordPress, Shopify, Next.js, etc.), CDN, analytics, and returns the page title, final URL after redirects, and key response headers. Use for competitive research and lead enrichment.

Parameters1

domain

string

required

Domain or full URL, e.g. shopify.com

Raw schema

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain or full URL, e.g. shopify.com"
    }
  },
  "required": [
    "domain"
  ]
}

subdomains

Discover subdomains of a domain from public Certificate Transparency logs (crt.sh). Useful for mapping a company's public surface (app., api., staging., etc.). Best-effort: crt.sh can be slow; returns a note if unavailable.

Parameters1

domain

string

required

Registrable domain, e.g. stripe.com

Raw schema

{
  "type": "object",
  "properties": {
    "domain": {
      "type": "string",
      "description": "Registrable domain, e.g. stripe.com"
    }
  },
  "required": [
    "domain"
  ]
}

README.md2 KBView on GitHub

Domain & Company Intel MCP — by SelfLabbs

Domain and company intelligence for AI agents. Give an agent a domain or email address and it can vet the company, qualify the lead, or map the target — all from free public data, no API keys.

Tools

Tool	What it does	Source
`domain_intel`	Registrar, creation/expiry dates, domain age, EPP status, nameservers, DNSSEC, abuse contact	RDAP
`dns_lookup`	A, AAAA, MX, NS, TXT, CNAME, SOA records	Cloudflare DoH
`email_deliverability`	MX presence, SPF/DMARC posture, free vs. disposable provider, verdict	Cloudflare DoH
`tech_stack`	Web server, CMS/framework, CDN, analytics, security headers, page title	Live fetch
`subdomains`	Subdomain discovery from Certificate Transparency logs	crt.sh

No API keys required for any tool.

Quick start (hosted)

Claude Code

bash

claude mcp add --transport http domain-intel https://domain-intel-mcp.greenfield1775.workers.dev/mcp

Claude Desktop / other clients

json

{
  "mcpServers": {
    "domain-intel": {
      "command": "npx",
      "args": ["mcp-remote", "https://domain-intel-mcp.greenfield1775.workers.dev/mcp"]
    }
  }
}

Example agent workflows

"Is acme.com a real, established business? When was it registered?" → domain_intel
"This lead's email is @acme.io — can it receive mail, is it a throwaway?" → email_deliverability
"What's competitor.com built on?" → tech_stack
"Map the public subdomains of target.com" → subdomains

Self-host (Cloudflare Workers, free tier)

Create a Worker, paste worker.js, deploy. Optional SERVER_API_KEY env var gates access behind Authorization: Bearer <key>. No other configuration needed.

License

MIT. Data from RDAP, Cloudflare DNS, and crt.sh under their respective terms.

Install

Tools (5)

domain_inteldns_lookupemail_deliverabilitytech_stacksubdomains

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://domain-intel-mcp.greenfield1775.workers.dev/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "domain-intel-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://domain-intel-mcp.greenfield1775.workers.dev/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.