# A Starlette middleware guide for FastAPI and Python developers

DevFeed: [A Starlette middleware guide for FastAPI and Python developers](<https://devfeed.tech/articles/a-starlette-middleware-guide-for-fastapi-and-python-developers-20057.md>)

Original publisher: [Read original article](<https://www.honeybadger.io/blog/starlette-middleware/>)

Author: Aditya Raj

Published: 2026-08-28T07:00:00Z

Content type: tutorial

Language: en

Sources: [Honeybadger](<https://devfeed.tech/sources/honeybadger.md>)

Topics: [FastAPI](<https://devfeed.tech/topics/fastapi.md>), [Python](<https://devfeed.tech/topics/python.md>), [ASGI](<https://devfeed.tech/topics/asgi.md>), [web applications](<https://devfeed.tech/topics/web-applications.md>), [Cross-origin resource sharing (CORS)](<https://devfeed.tech/topics/cors.md>)

Tags: [auth](<https://devfeed.tech/tags/auth.md>), [cors](<https://devfeed.tech/tags/cors.md>), [developers](<https://devfeed.tech/tags/developers.md>), [fastapi](<https://devfeed.tech/tags/fastapi.md>), [guide](<https://devfeed.tech/tags/guide.md>), [logging](<https://devfeed.tech/tags/logging.md>), [middleware](<https://devfeed.tech/tags/middleware.md>), [python](<https://devfeed.tech/tags/python.md>), [python-articles](<https://devfeed.tech/tags/python-articles.md>), [starlette](<https://devfeed.tech/tags/starlette.md>), [web-applications](<https://devfeed.tech/tags/web-applications.md>)

## AI overview

This guide explains how middleware works in Starlette and FastAPI applications. It covers built-in middleware, custom middleware using pure ASGI and BaseHTTPMiddleware, and execution order when multiple middleware layers process requests and responses.

## Source excerpt

Starlette middlewares let you apply logging, auth, and CORS across every route in a web app without duplicating code. This article covers Starlette's built-in middlewares, building custom ones with pure ASGI and BaseHTTPMiddleware, and the execution-order rules that keep your FastAPI applications secure and fast. Read on to learn how to build and order Starlette middlewares the right way.