A type-safe, composable authorization library for any JavaScript/TS stack (zapstudio.dev)

Authorization logic is often scattered and duplicated — so we built @zap-studio/permit to centralize it with declarative, type-safe policies and composable rule building blocks.

Works with Express, Fastify, Next.js, Deno, and really anywhere you need authz.

MIT licensed, ecosystem-agnostic, and great DX. Try it out!