Also there is no standard for exposing the schema, and sometimes there isn't a schema at all. Sometimes a vendor will have the schema downloadable from their dev docs, sometimes it will be an endpoint that serves it up, and sometimes they just don't give it to you and expect you to use GraphQL Explorer directly to discover what you can do. When I encountered this I figured surely GraphQL Explorer must be fetching the schema, but I guess this is not always the case, as I never was able to get a complete schema that worked with the tooling. For that vendor, there was no way to generate client code for the schema using one of the many GraphQL client library generator frameworks.