graphql introspection query

query IntrospectionQuery {
   __schema {
      queryType {
         name
      }
      mutationType {
         name
      }
      subscriptionType {
         name
      }
      types {
         ...FullType
      }
      directives {
         name
         description
         args {
            ...InputValue
         }
      }
   }
}
fragment FullType on __Type {
   kind
   name
   description
   fields(includeDeprecated: true) {
      name
      description
      args {
         ...InputValue
      }
      type {
         ...TypeRef
      }
      isDeprecated
      deprecationReason
   }
   inputFields {
      ...InputValue
   }
   interfaces {
      ...TypeRef
   }
   enumValues(includeDeprecated: true) {
      name
      description
      isDeprecated
      deprecationReason
   }
   possibleTypes {
      ...TypeRef
   }
}
fragment InputValue on __InputValue {
   name
   description
   type {
      ...TypeRef
   }
   defaultValue
}
fragment TypeRef on __Type {
   kind
   name
   ofType {
      kind
      name
      ofType {
         kind
         name
         ofType {
            kind
            name
         }
      }
   }
}