starlette-context

Middleware for Starlette that allows you to store and access the context data of a request. Can be used with logging so logs automatically use request headers such as x-request-id or x-correlation-id. Maintained by tomwojcik on GitHub, where it has earned 614 stars from the community.

It's actively developed around fastapi, middleware, python, and is a solid reference for anyone building with these tools.