Whoiser MCP server

This MCP server allows AI agents like Claude Desktop, Cursor, and Windsurf to perform WHOIS lookups and retrieve domain details. With this tool, you can directly ask AI to check domain availability, ownership, registration dates, and other important information without needing to search in a browser.

What is a WHOIS Lookup?

A WHOIS lookup queries a database to retrieve registration details about a domain name, IP address, or autonomous system. It provides information such as:

• Domain name and registrar
• Registrant details (unless protected by privacy)
• Registration and expiry dates
• Name servers the domain is using
• Domain status (active, expired, etc.)
• Contact information (if not hidden)

Available Tools

Tool	Description
whois_domain	Looks up WHOIS information about a domain
whois_tld	Looks up WHOIS information about a Top Level Domain (TLD)
whois_ip	Looks up WHOIS information about an IP address
whois_as	Looks up WHOIS information about an Autonomous System Number (ASN)

Installation Options

Using npx (Global Installation)

The simplest way to run the MCP server is using npx:

npx -y @mcp-server/whois-mcp@latest

Project-specific Installation

For a project-specific installation, add an .cursor/mcp.json file to your project:

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

Integration with AI Tools

Using with Cursor

Global Setup:

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 @mcp-server/whois-mcp@latest

Once configured, the WHOIS tools will be automatically available to the Cursor AI Agent. The tools will be listed under Available Tools in MCP settings, and the agent will use them when relevant.

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.

Add the following configuration:

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

After configuration, the WHOIS capabilities will be available to Roo Code's AI agents.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "whois" '{"command":"npx","args":["-y","@mcp-server/whois-mcp@latest"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

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

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

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

3. Restart Claude Desktop for the changes to take effect