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who.is

Official registry Search and web

Parsed WHOIS, RDAP, DNS, certificates, nameservers and domain history for any domain.

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http who-is 'https://api.who.is/v1/mcp' --header 'Authorization: <Bearer <your who.is API key>, from https://who.is/account/api>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "who-is": {
            "type": "http",
            "url": "https://api.who.is/v1/mcp",
            "headers": {
                "Authorization": "<Bearer <your who.is API key>, from https://who.is/account/api>"
            }
        }
    }
}

Frequently asked questions

What is who.is?

Parsed WHOIS, RDAP, DNS, certificates, nameservers and domain history for any domain.

How do I install who.is?

It runs as a remote server. In Claude Code: claude mcp add --transport http who-is 'https://api.who.is/v1/mcp' --header 'Authorization: <Bearer <your who.is API key>, from https://who.is/account/api>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does who.is need an API key?

Yes. It expects Authorization, which you set in its configuration.

Who maintains who.is?

It is published by is.who. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.