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@whoisjson/mcp-server

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@whoisjson/mcp-server

MCP (Model Context Protocol) server for the WhoisJSON API. Exposes WHOIS, DNS, SSL, and domain availability lookups as tools for AI assistants.

Tools

Tool

Description

whois_lookup

WHOIS registration data for a domain (registrar, dates, contacts, nameservers…)

dns_lookup

All DNS records for a domain (A, AAAA, MX, NS, TXT, CNAME, SOA, CAA, DMARC…)

ssl_check

SSL/TLS certificate details and validity for a domain

domain_availability

Check if a domain is available for registration

Related MCP server: Domain Checker MCP Server

Prerequisites

  1. Sign up at whoisjson.com and copy your API key from the dashboard.

  2. Node.js ≥ 18.

Installation

npm install -g @whoisjson/mcp-server
# or run directly with npx (no install needed):
npx @whoisjson/mcp-server

Configuration

Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or
%APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "whoisjson": {
      "command": "npx",
      "args": ["-y", "@whoisjson/mcp-server"],
      "env": {
        "WHOISJSON_API_KEY": "your_api_key_here"
      }
    }
  }
}

Cursor

Edit ~/.cursor/mcp.json:

{
  "mcpServers": {
    "whoisjson": {
      "command": "npx",
      "args": ["-y", "@whoisjson/mcp-server"],
      "env": {
        "WHOISJSON_API_KEY": "your_api_key_here"
      }
    }
  }
}

Windsurf

Edit ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "whoisjson": {
      "command": "npx",
      "args": ["-y", "@whoisjson/mcp-server"],
      "env": {
        "WHOISJSON_API_KEY": "your_api_key_here"
      }
    }
  }
}

Running locally (development)

cd mcp-server
npm install
npm run build
WHOISJSON_API_KEY=your_key npm start

Publishing

npm run build
npm publish --access public

API reference

Full API documentation: whoisjson.com/documentation

Install Server
A
license - permissive license
A
quality
D
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

Tools

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  • Domain Checker MCP Server

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  • MCP Domain Availability Server

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  • mcp-ip2location

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