YasuiJSShip production-ready REST APIs in minutes

A lightweight framework, but with everything you need.

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Lightweight, Multi-Runtime

Minimal dependencies, built on Web Standards. Run on Node.js, Deno, Bun, or deploy to edge runtimes. Production-ready without the bloat.

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Declarative API development with TypeScript decorators. Clean, scalable class-based architecture.

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Constructor and method-level injection with 3 configurable scopes. Simple yet powerful, no complex module system required.

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Middlewares work like controllers. Same decorators, same DI, same parameter extraction everywhere.

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OpenAPI documentation generated from your existing code. Flexible decorators for enums, arrays, classes, and complex schemas.

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Complete error handling, logging, config management, TLS/HTTPS, HTTP/2 support. Everything you need to ship with confidence.