[ddorian43]

it uses json ? so you compare it to that

[andrewingram]

The default is JSON, but the spec doesn't mandate that it be JSON over the wire, or that even that it be over HTTP.

[throwaway2016a]

Also in the Json the "query" is actually a string that is in GraphQL language. So GraphQL is an encoded format embedded inside Json.

{ "query": "mutation Foo() { ... }" }

As such type safety is dependent on the query langauge (graphQL) not Json. As far as the Json goes, it might as well be multi-part form encoded.