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io.github.ofershap/dns

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MCP server for DNS lookups, reverse DNS, WHOIS, and domain checks — zero auth, zero config

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package mcp-server-dns
Claude Code 
claude mcp add dns -- npx -y mcp-server-dns@1.0.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "dns": {
            "command": "npx",
            "args": [
                "-y",
                "mcp-server-dns@1.0.1"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. mcp-server-dns
  2. Why
  3. Tools
  4. Quick Start
  5. Examples
  6. Development
  7. See also
  8. Author
  9. License

mcp-server-dns

DNS lookups, reverse DNS, WHOIS, and domain checks from your AI assistant. No API keys, no config. Powered by Node.js built-in DNS.

npx mcp-server-dns

Works with Claude Desktop, Cursor, VS Code Copilot, and any MCP client. Uses Node.js native dns module, so there's nothing to sign up for.

Demo built with remotion-readme-kit

Why

DNS and WHOIS lookups come up more often than you'd think during development. Debugging email delivery? You need MX records. Setting up a new domain? Check the nameservers. Investigating a suspicious URL? WHOIS tells you who owns it. The existing MCP options for this require paid API keys (like WhoisXML API). This server uses Node.js built-in DNS resolution and public WHOIS servers, so it works out of the box with zero accounts or credentials.

Tools

ToolWhat it does
dns_lookupLook up A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, or PTR
reverse_dnsPerform reverse DNS (PTR) lookup on an IP address
resolve_allResolve A, AAAA, MX, TXT, NS, CNAME in one call
check_nameserversGet nameserver (NS) records for a domain
whoisQuery WHOIS data (follows IANA referrals to registrar)

Quick Start

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "dns": {
      "command": "npx",
      "args": ["-y", "mcp-server-dns"]
    }
  }
}
Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "dns": {
      "command": "npx",
      "args": ["-y", "mcp-server-dns"]
    }
  }
}
VS Code

Add to user settings or .vscode/mcp.json:

{
  "mcp": {
    "servers": {
      "dns": {
        "command": "npx",
        "args": ["-y", "mcp-server-dns"]
      }
    }
  }
}

Examples

  • "What are the DNS records for example.com?"
  • "Do a reverse DNS lookup on 8.8.8.8"
  • "Show me the WHOIS info for github.com"
  • "What nameservers does cloudflare.com use?"
  • "Resolve all record types for google.com"
  • "Check the MX records for my-company.com"

Development

git clone https://github.com/ofershap/mcp-server-dns.git
cd mcp-server-dns
npm install
npm test
npm run build

See also

More MCP servers and developer tools on my portfolio.

Author

README built with README Builder

License

MIT © 2026 Ofer Shapira

Frequently asked questions

What is io.github.ofershap/dns?

MCP server for DNS lookups, reverse DNS, WHOIS, and domain checks — zero auth, zero config

How do I install io.github.ofershap/dns?

It runs on your machine. In Claude Code: claude mcp add dns -- npx -y mcp-server-dns@1.0.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.ofershap/dns need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.ofershap/dns open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.ofershap/dns?

It is published by ofershap. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.