Attached is a new port for a RDAP client. My limited searching in ports didn't turn one up. My first cargo port as well.
Information for inst:icann-rdap-0.0.21 Comment: command-line RDAP client Description: The rdap command is a full-featured, command-line interface (CLI) client for RDAP. It supports RDAP bootstrapping, caching, different output formats, and many more features. Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org> WWW: https://github.com/icann/icann-rdap
icann-rdap.tar.gz
Description: application/tar-gz