WhoisJSON

Overview

WhoisJSON is an MCP server that brings WHOIS, DNS, SSL, and domain availability lookups directly to AI assistants. Instead of switching between tools and copying results, your AI can call these lookups as native capabilities through the Model Context Protocol.

The server runs locally on your machine via the npm package @whoisjson/mcp-server. Install it with npx -y @whoisjson/mcp-server and configure it by setting the WHOISJSON_API_KEY environment variable. The latest release is v1.0.3, with source code available at Whoisjson/mcp-server on GitHub.

WhoisJSON belongs in the AI & Agents category on mcp.site and works with any MCP client, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain this server, claim this listing to verify ownership and keep the information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "whoisjson": {
      "command": "npx",
      "args": [
        "-y",
        "@whoisjson/mcp-server"
      ],
      "env": {
        "WHOISJSON_API_KEY": "<whoisjson-api-key>"
      }
    }
  }
}

Requires WHOISJSON_API_KEY