Sure, you can design a standard format on top of JSON, but that is rarely done. The whole appeal of it is for passing around ad-hoc data structures. There are

Sure, you can design a standard format on top of JSON, but that is rarely done. The whole appeal of it is for passing around ad-hoc data structures. There are many hypermedia formats built on XML, but when it's just used as a data container for an API, it's not hypermedia.