REST is supposed to mean systems compliant with the architectural style defined by Roy Fielding in chapter 5 of his dissertation: https://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arc...

Unfortunately, in popular programming it has become to mean anything and everything that uses resource-oriented URLs and at least loosely: HTTP methods as verbs to "operate" on those resources.

The misuse of the "REST" as a term, has required the creation of a new term: Hypermedia APIs: https://en.wikipedia.org/wiki/Hypermedia_API