Whois MCP

What is Whois MCP about?

Whois MCP provides a Model Context Protocol (MCP) server that enables AI agents such as Claude Desktop, Cursor, and Roo Code to query WHOIS databases. It returns domain ownership, registrar information, registration and expiry dates, name servers, status, and contact details without leaving the IDE.

How to use Whois MCP?

1. Global installation – run the server with a single command:

   npx -y @bharathvaj/whois-mcp@latest
   

2. Configure in Cursor – add a new MCP server in Cursor Settings → MCP, set the name (e.g., "Whois Lookup"), type = command, and command = npx -y @bharathvaj/whois-mcp@latest.
3. Project‑specific configuration – place an .cursor/mcp.json (or VS Code Roo Code config) containing:

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

4. Once configured, the tools whois_domain, whois_tld, whois_ip, and whois_as become available for the AI to invoke automatically or on request.

Key features of Whois MCP

• Four dedicated tools: whois_domain, whois_tld, whois_ip, whois_as.
• Zero‑setup execution via npx – no permanent installation required.
• Cross‑IDE support: works with Cursor, Claude Desktop, Roo Code, and any MCP‑compatible environment.
• Rich WHOIS data: registrar, registrant, dates, name servers, status, and contact information.
• Debugging support with the MCP Inspector for development and troubleshooting.

Use cases of Whois MCP

• Domain availability checks directly from a coding session.
• Automated security analysis to verify ownership of suspicious domains.
• Research workflows where agents need domain metadata without manual browsing.
• Customer support tools that retrieve ownership info when handling domain‑related tickets.
• Educational demos showing how AI agents can leverage external data sources.

FAQ from the Whois MCP

Q: Do I need an API key? A: No API key is required; the server uses public WHOIS lookups.

Q: Can I run the server locally? A: Yes, simply execute the npx command on any machine with Node.js installed.

Q: Which platforms are supported? A: Any environment that can run a Node.js process and supports MCP, including Cursor, Claude Desktop, and VS Code extensions.

Q: How do I debug issues? A: Build the project (pnpm build) and run it with the MCP Inspector: npx @modelcontextprotocol/inspector node dist/index.js.

Q: Is the project open source? A: Yes, it is released under the MIT license.

Whois MCP

Model Context Protocol server for whois lookups.

Cursor IDE Demo

https://github.com/user-attachments/assets/57a82adc-3f30-453f-aabd-7138c2e6a21d

Claude Desktop Demo

https://github.com/user-attachments/assets/d30a1f45-fdaf-4280-80f2-d5d4fc9743b1

Overview

This MCP server allows AI agents like Claude Desktop, Cursor, Windsurf,.. etc to perform WHOIS lookups and retrieve domain details.

Purpose You can directly ask the AI to check if a domain is available, who owns it, when it was registered, and other important details. No need to go to browser and search.

What is a WHOIS Lookup? A WHOIS lookup is the process of querying a WHOIS database to retrieve registration details about a domain name, IP address, or autonomous system. It helps users find out who owns a domain, when it was registered, when it expires, and other important details.

What Information Can a WHOIS Lookup Provide?

When you perform a WHOIS lookup, you can retrieve details such as:

• Domain Name – The specific domain queried
• Registrar Name – The company managing the domain registration (e.g., GoDaddy, Namecheap)
• Registrant Details – The name, organization, and contact details of the domain owner (unless protected by WHOIS privacy)
• Registration & Expiry Date – When the domain was registered and when it will expire
• Name Servers – The DNS servers the domain is using
• Domain Status – Active, expired, locked, or pending deletion
• Contact Information – Administrative, technical, and billing contacts (if not hidden)

Available Tools

Tool	Description
whois_domain	Looksup whois information about the domain
whois_tld	Looksup whois information about the Top Level Domain (TLD)
whois_ip	Looksup whois information about the IP
whois_as	Looksup whois information about the Autonomous System Number (ASN)

Using with Cursor

Installation - Globally

Run the MCP server using npx:

npx -y @bharathvaj/whois-mcp@latest

In your Cursor IDE

1. Go to Cursor Settings > MCP
2. Click + Add New MCP Server
3. Fill in the form:
   • Name: Whois Lookup (or any name you prefer)
   • Type: command
   • Command: npx -y @bharathvaj/whois-mcp@latest

Installation - Project-specific

Add an .cursor/mcp.json file to your project:

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

Usage

Once configured, the whois tools will be automatically available to the Cursor AI Agent. You can:

1. The tool will be listed under Available Tools in MCP settings
2. Agent will automatically use it when relevant
3. You can explicitly ask Agent to send notifications

Using with Roo Code

Access the MCP settings by clicking “Edit MCP Settings” in Roo Code settings or using the “Roo Code: Open MCP Config” command in VS Code's command palette.

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

3. The whois capabilities will be available to Roo Code's AI agents

Development

# Install dependencies
pnpm install

# Build
pnpm build

Debugging the Server

To debug your server, you can use the MCP Inspector.

First build the server

pnpm build

Run the following command in your terminal:

# Start MCP Inspector and server with all tools
npx @modelcontextprotocol/inspector node dist/index.js

License

MIT