To get the WikiRate data as JSON responses via swaggerhub you can:
WikiRate is built with Decko, and is thus constructed from cards.
Everything in Decko is a card, including images, accounts, searches, fields, etc. So every request for a webpage on WikiRate.org or via its REST API is for a card.
The documentation is divided into generic Decko card documentation (under Decko) and more WikiRate-specific cardtypes (under WikiRate).