Litestar

Litestar is a Python framework for building ASGI web apps and APIs. It uses type hints to validate data and generate documentation, and it includes dependency injection and many features in the core.

You write handlers with type annotations, and Litestar uses those types to parse, validate and serialise requests and responses. OpenAPI schemas are generated automatically and can be explored through Swagger or other interactive docs. Configuration can be set at the application, controller or route level, so shared settings stay in one place.

• Type hints drive validation and serialisation
• Automatic OpenAPI schemas and interactive docs
• Dependency injection built in
• Works with dataclasses, Pydantic and msgspec

Python API teams that want typed code, clear conventions and generated documentation. It suits microservices and back-end services where the API contract matters and the team wants fewer hand-written checks.

Litestar is open source under the MIT licence and free to use. It has an official plugin system and a community of plugins. Its opinionated defaults guide you toward one way of working, which helps consistency but means you should learn the conventions before you start.