Rdap MCP Server

What is rdap-mcp-server?

rdap-mcp-server is a Model Context Protocol (MCP) server that uses the RDAP (Registration Data Access Protocol) to look up information about domain names, IP addresses, and Autonomous System Numbers (ASNs). It is a fork of the whois-mcp server and is designed for users who need RDAP data, especially for TLDs like .dev that no longer support the traditional whois protocol.

How to use rdap-mcp-server?

The server is distributed as a Docker container. To use it, add the following configuration to your MCP client’s mcpServers section:

"mcpServers": {
  "domains": {
    "command": "docker",
    "args": ["run", "-i", "--rm", "ghcr.io/clareliguori/rdap-mcp-server"]
  }
}

After setup, the server exposes three tools: rdap_domain, rdap_ip, and rdap_as. For local development, you can clone the repository, run npm install, npm run build, and debug with the MCP inspector.

Key features of rdap-mcp-server

• Uses RDAP, which supports modern TLDs that no longer offer whois.
• Three tools: domain, IP, and ASN lookups.
• Runs as a lightweight Docker container.
• Forked from whois-mcp with RDAP integration.
• Can be built and debugged locally with Node.js.

Use cases of rdap-mcp-server

• Querying registration data for a domain name (e.g., rdap_domain example.com).
• Looking up IP address ownership and geolocation details.
• Retrieving information about an Autonomous System Number (ASN).
• Replacing whois-based lookups for TLDs that have migrated to RDAP.