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BUZDOLAPCI

dns-intel

by BUZDOLAPCI
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TypeScript
Remote

DNS Intel MCP Server

Domain intelligence MCP server providing RDAP lookups, DNS queries, and Certificate Transparency log searches.

Features

  • RDAP Lookup: Query domain registration information (registrar, dates, nameservers, status)

  • DNS Query: Perform DNS queries for A, AAAA, CNAME, TXT, MX, NS, and SOA records

  • CT Search: Search Certificate Transparency logs for certificates issued for a domain

Related MCP server: Yunaq GAC MCP Server

Installation

npm install
npm run build

Usage

As MCP Server (stdio)

# Start the server
npm start

# Or with custom configuration
DNS_RESOLVER=1.1.1.1 npm start

With Claude Desktop

Add to your Claude Desktop configuration (~/.config/claude/claude_desktop_config.json):

{
  "mcpServers": {
    "dns-intel": {
      "command": "node",
      "args": ["/path/to/dns-intel/dist/cli.js"]
    }
  }
}

With HTTP Health Checks

For containerized deployments, enable the HTTP health check server:

npm start -- --http

This exposes:

  • GET /health - Health check endpoint

  • GET /ready - Readiness probe

Tools

rdap_lookup

Query RDAP for domain registration information.

Input:

{
  "domain": "example.com"
}

Output:

{
  "ok": true,
  "data": {
    "domain": "example.com",
    "registrar": "Example Registrar Inc.",
    "creation_date": "1995-08-14T04:00:00Z",
    "expiration_date": "2025-08-13T04:00:00Z",
    "updated_date": "2024-08-14T07:01:34Z",
    "status": ["clientDeleteProhibited", "clientTransferProhibited"],
    "nameservers": ["a.iana-servers.net", "b.iana-servers.net"]
  },
  "meta": {
    "source": "rdap-bootstrap.iana.org",
    "retrieved_at": "2024-01-15T10:30:00Z"
  }
}

dns_query

Perform DNS queries for various record types.

Input:

{
  "name": "example.com",
  "type": "MX",
  "resolver": "8.8.8.8"
}

Output:

{
  "ok": true,
  "data": {
    "name": "example.com",
    "type": "MX",
    "resolver": "8.8.8.8",
    "records": [
      {
        "name": "example.com",
        "type": "MX",
        "ttl": 300,
        "data": {
          "priority": 10,
          "exchange": "mail.example.com"
        }
      }
    ]
  },
  "meta": {
    "source": "https://dns.google/resolve",
    "retrieved_at": "2024-01-15T10:30:00Z"
  }
}

Supported Record Types:

  • A - IPv4 address

  • AAAA - IPv6 address

  • CNAME - Canonical name

  • TXT - Text records

  • MX - Mail exchange

  • NS - Nameserver

  • SOA - Start of authority

ct_search

Search Certificate Transparency logs for certificates.

Input:

{
  "domain": "example.com",
  "limit": 100,
  "cursor": null
}

Output:

{
  "ok": true,
  "data": {
    "domain": "example.com",
    "certificates": [
      {
        "id": 12345678,
        "issuer_ca_id": 16418,
        "issuer_name": "C=US, O=Let's Encrypt, CN=R3",
        "common_name": "*.example.com",
        "name_value": "example.com\n*.example.com",
        "not_before": "2024-01-01T00:00:00",
        "not_after": "2024-04-01T00:00:00",
        "serial_number": "abc123...",
        "entry_timestamp": "2024-01-01T00:00:01"
      }
    ],
    "total_returned": 1
  },
  "meta": {
    "source": "crt.sh",
    "retrieved_at": "2024-01-15T10:30:00Z",
    "pagination": {
      "next_cursor": "eyJvZmZzZXQiOjEwMH0="
    }
  }
}

Configuration

Environment variables:

Variable

Default

Description

DNS_RESOLVER

8.8.8.8

Default DNS resolver for queries

REQUEST_TIMEOUT_MS

10000

Request timeout in milliseconds

HTTP_PORT

3000

HTTP server port for health checks

LOG_LEVEL

info

Log level (debug, info, warn, error)

Response Format

All tools return a standard response envelope:

Success Response

{
  "ok": true,
  "data": { ... },
  "meta": {
    "source": "...",
    "retrieved_at": "2024-01-15T10:30:00Z",
    "pagination": { "next_cursor": null },
    "warnings": []
  }
}

Error Response

{
  "ok": false,
  "error": {
    "code": "UPSTREAM_ERROR",
    "message": "Human readable error message",
    "details": { ... }
  },
  "meta": {
    "retrieved_at": "2024-01-15T10:30:00Z"
  }
}

Error Codes:

  • INVALID_INPUT - Invalid input parameters

  • UPSTREAM_ERROR - Error from upstream service

  • RATE_LIMITED - Rate limit exceeded

  • TIMEOUT - Request timed out

  • PARSE_ERROR - Failed to parse response

  • INTERNAL_ERROR - Internal server error

Development

# Install dependencies
npm install

# Run in development mode
npm run dev

# Run tests
npm test

# Run tests with coverage
npm run test:coverage

# Type check
npm run typecheck

# Build
npm run build

License

MIT

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