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Whois

v1.0.0•Developer Tools•stable

A Model Context Protocol server that allows AI agents to perform WHOIS lookups, enabling users to directly ask the AI about domain availability, ownership, registration details, and other domain information.

whois-mcpmcpai-integration
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What is Whois?

Whois is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to model context protocol server that allows ai agents to perform whois lookups, enabling users to directly ask the ai about domain availability, ownership, registration details, and other domain informa...

A Model Context Protocol server that allows AI agents to perform WHOIS lookups, enabling users to directly ask the AI about domain availability, ownership, registration details, and other domain information.

This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.

Features

  • A Model Context Protocol server that allows AI agents to per

Use Cases

Domain WHOIS information lookup
modelcontextprotocol-servers

Maintainer

LicenseMIT License
Languagejavascript
Versionv1.0.0
UpdatedOct 29, 2025
Statushealthy
Maintenanceactive

Works with

ClaudeOpenAIwindowsmacoslinux
View SourceBrowse All Servers

Installation

Manual Installation

npx whois-mcp

Configuration

Configuration Details

Config File

claude_desktop_config.json

Performance

Response Metrics

Response Time< 200ms
ThroughputMedium

Resource Usage

Memory UsageLow
CPU UsageLow

How to Set Up and Use Whois

The Whois MCP server gives AI assistants direct access to WHOIS database lookups for domains, IP addresses, TLDs, and Autonomous System Numbers (ASNs). Instead of leaving your AI client to visit external sites, you can ask Claude or Cursor to check domain availability, look up registrant details, verify DNS servers, or investigate IP ownership — and get structured answers without switching context. The server exposes four focused tools covering the full range of WHOIS query types.

Prerequisites

  • Node.js 18 or later installed
  • An MCP-compatible client (Claude Desktop, Cursor, Windsurf, Roo Code, VS Code with Cline)
  • No API keys required — WHOIS lookups are performed directly
1

Add the server to your MCP client config

Edit your MCP client configuration file to register the whois-mcp server using npx. For Claude Desktop on macOS, the config is at ~/Library/Application Support/Claude/claude_desktop_config.json.

{
  "mcpServers": {
    "whois": {
      "command": "npx",
      "args": ["-y", "@mcp-server/whois-mcp@latest"]
    }
  }
}
2

For Cursor: add via Settings UI

In Cursor go to Settings → MCP → Add New MCP Server. Set the name to 'Whois Lookup', type to 'command', and command to: npx -y @mcp-server/whois-mcp@latest. Click Save.

3

For project-scoped installation in Cursor

Add a .cursor/mcp.json file to your project root to scope the server to that project only.

{
  "mcpServers": {
    "whois": {
      "command": "npx",
      "args": ["-y", "@mcp-server/whois-mcp@latest"]
    }
  }
}
4

Restart your MCP client

Restart Claude Desktop or reload your editor. The whois_domain, whois_tld, whois_ip, and whois_as tools will become available to the AI agent automatically.

5

Verify the tools are available

Ask your AI assistant to perform a WHOIS lookup on a domain you know. If configured correctly, it will use the whois_domain tool and return registrar, registration date, expiry, name servers, and registrant details.

Whois Examples

Client configuration

Claude Desktop configuration for the Whois MCP server.

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

Prompts to try

Example WHOIS queries you can ask your AI assistant once the server is running.

- "Is the domain mycoolstartup.io available? Who owns it if not?"
- "Look up the WHOIS record for github.com and tell me when it expires"
- "Who is the registrar for the .dev TLD?"
- "What organization owns the IP address 8.8.8.8?"
- "Look up ASN 15169 and tell me which organization it belongs to"

Troubleshooting Whois

WHOIS lookup returns empty or incomplete data for some domains

Some registrars redact registrant contact information due to GDPR privacy policies. The registration date, expiry, and name server data should still be available even when contact details are hidden.

npx command not found or the server fails to start

Ensure Node.js 18+ is installed ('node --version'). If npx is available but the package fails to download, run 'npm cache clean --force' and try again.

Rate limiting errors from the WHOIS server

WHOIS servers impose rate limits on repeated queries. Space out lookups by a few seconds if you are querying many domains in sequence.

Frequently Asked Questions about Whois

What is Whois?

Whois is a Model Context Protocol (MCP) server that model context protocol server that allows ai agents to perform whois lookups, enabling users to directly ask the ai about domain availability, ownership, registration details, and other domain information. It connects AI assistants to external tools and data sources through a standardized interface.

How do I install Whois?

Follow the installation instructions on the Whois GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.

Which AI clients work with Whois?

Whois works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.

Is Whois free to use?

Yes, Whois is open source and available under the MIT License license. You can use it freely in both personal and commercial projects.

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Quick Config Preview

{ "mcpServers": { "whois-mcp": { "command": "npx", "args": ["-y", "whois-mcp"] } } }

Add this to your claude_desktop_config.json or .cursor/mcp.json

Read the full setup guide →

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