There is a standard, it's called GraphQL: https://spec.graphql.org/October2021/#sec-Schema-Introspection https://spec.graphql.org/October2021/#sec-Schema-Intros

There is a standard, it's called GraphQL: https://spec.graphql.org/October2021/#sec-Schema-Introspection https://spec.graphql.org/October2021/#sec-Schema-Introspecti... I'm not saying the service isn't a true Scotsman, but a service that calls its API "GraphQL" but doesn't respond to introspection queries isn't really serving GraphQL.