Introduction[Link]

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.

Example:

curl https://rdap.nic.brussels/domain/nic.brussels

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