Is the REST protocol compatible with HTTP/3?

Yes, the REST protocol is compatible with HTTP/3 because REST is an architectural style of interaction based on using the HTTP protocol for resource transfer.

HTTP/3 is a new version of the HTTP protocol built on top of the QUIC transport protocol, which operates over UDP. It provides faster and more reliable data transfer.

Since REST uses HTTP as a transport protocol, it can operate over any version of HTTP, including HTTP/3, provided that the server and client support HTTP/3.

Therefore, a REST API can be implemented and operate over HTTP/3 without changes to the REST architecture itself.