● Apollo Studio Explorer

エンドポイント : localhost:4000/graphql で起動します
https://studio.apollographql.com/sandbox?endpoint=http://localhost:4000/graphql/

● ドキュメント

https://www.apollographql.com/docs/graphos/explorer/

・ schema diff

https://www.apollographql.com/blog/announcement/platform/how-to-run-diffs-and-operation-checks-in-apollo-sandbox/