Pydantic for request/response validation and typed backend models

Pydantic enforces type hints at runtime to provide zero-boilerplate data validation and settings management for Python backends.

Pydantic 2.0 leverages a Rust-based core to validate data up to 20x faster than previous versions. It integrates directly with FastAPI to handle incoming JSON payloads and outgoing responses (ensuring 100% schema compliance). By using standard Python type hints, it generates precise error messages for invalid fields and automatically creates OpenAPI documentation. It is the industry standard for modern Python services: used by 20 of the top 25 Fortune 100 companies to maintain strict data integrity across distributed systems.

https://docs.pydantic.dev/