Skip to content
mcp/harbor
Claude Desktop

WhoisJSON for Claude Desktop

io.github.whoisjson/mcp-server

WHOIS, DNS, SSL, and domain availability lookups for AI assistants

client:Claude Desktop transport:stdio runtime:npm

Install WhoisJSON in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

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

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs

WhoisJSON in other clients

WhoisJSON MCP server