Tools

Sleeper GraphQL Studio

Browse every Sleeper GraphQL operation, store your league IDs once, and run queries live. Money ops are copy-only; destructive ops are gated.

Heads up — this drives Sleeper's authenticated, write-capable API. Your token grants full account access, including real money. It is stored only in your own browser (session by default) and is sent only to sleeper.com — never to MyGM. Real-money operations are copy-only; destructive operations require the in-app Danger toggle plus a typed confirmation. Use a throwaway league for anything irreversible.

Prefer fully offline? Open /graphql-studio.html directly, or download it and run from file://. Regenerate with node tools/build-sleeper-studio.mjs.