RESTiin

RESTiin is an open-source Python microframework designed for building RESTful web services. It offers a lightweight, opinionated toolkit intended to reduce boilerplate while maintaining performance. Core goals include fast routing, composable middleware, and automatic API documentation generation.

RESTiin was first released in 2020 by a distributed group of contributors seeking a simple, Pythonic alternative to heavier frameworks. It is maintained by an open-source community and released under a permissive license. The project has progressed through multiple releases, with the 1.x line emphasizing stability and the 2.x line introducing asynchronous handlers and improved typing.

Key features include declarative routing via decorators or annotations, automatic input validation and serialization, support for both synchronous and asynchronous handlers, a pluggable middleware stack, dependency injection, content negotiation, and built-in error handling. The framework also provides rate limiting, caching hooks, and automatic generation of OpenAPI specifications. The design aims to minimize configuration while remaining flexible enough for extensions and plugins.

Architecture and design of RESTiin center on compatibility with ASGI servers and a lightweight dispatch layer. It separates routing from middleware concerns and supports a pluggable architecture for authentication, data validation, and caching. Emphasis is placed on type hints and explicitness to aid maintainability and testing.

RESTiin has seen usage in small teams and educational projects. Documentation and examples focus on rapid prototyping and clear API contracts. The project maintains a community forum and issue tracker to support collaboration, with a permissive license suitable for both commercial and non-commercial use.