RDAP is a protocol to query registration data. It is the successor of WHOIS and has many advantages over WHOIS, including:

  • internationalisation

  • authentication and authorisation

  • it enables roles-based access to attributes

  • searching

The protocol is built upon a REST API and is standardised in RFC 7480, RFC 7481, RFC 9082, RFC 9083 and RFC 9224

There are a lot of clients specifically implemented for RDAP, but you can invoke RDAP queries by using curl or wget.



When invoking RDAP calls programmatically, in general we advise you to look for a generic REST client to invoke the RDAP calls.