RFC 10008 defines HTTP QUERY as a safe, idempotent method with request content. It expresses complex searches without forcing all input into a URI or implying POST-like mutations.
The demo sends a QUERY body, retries after a connection failure, and receives the same result. Check server and intermediary support before adopting a new method.
When to use
Consider it for complex body-based searches when safe retry semantics should be explicit.