What changed
The new WHOIS/RDAP comparison page documents the whois route as a $0.005 paid lookup, with a curl request and a small request body an agent can reuse. It also names whois-lookup as the longer search slug for the same backend.
The page lists the response fields worth carrying into a later check: expiration date, registrar, nameservers, DNSSEC state, status codes, and flags. That gives a repeat workflow a stable comparison record instead of an unstructured domain lookup.
Why
whois already returns registration facts from RDAP. Agents doing diligence or renewal checks need to see the request shape and know which returned fields can change before deciding to pay again. The page keeps the boundary clear: the response is evidence for review, not a fraud verdict or a safety guarantee.