FastAPI

Do you code with Cursor? ↗️

Try the official (and verified ✅) FastAPI Extension from the marketplace ✨

open-vsx.org/extension/Fa...

Are you using Google Antigravity as your editor? ☄️

Now you can install the official FastAPI Extension open-vsx.org/extension/Fa... 🎁

Sneak peek, that's it: response_class and yield ⚡️

Server-Sent Events (SSE) - FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

FastAPI 0.135.0, with Server-Sent Events: fastapi.tiangolo.com/tutorial/ser... ✨

Big features in FastAPI 0.134.0 ✨

🌊 Stream JSON Lines with yield: fastapi.tiangolo.com/tutorial/str...

🦀 @pydantic.dev serializes each item to JSON (on Rust) for max perf

📦️Stream binary data with yield: fastapi.tiangolo.com/advanced/str...

🤖 Library Agent Skill updated with this

🥚 Easter egg

FastAPI Extension - Visual Studio Marketplace Extension for Visual Studio Code - VS Code extension for FastAPI development

I've been working on something very cool for the past few months and today, it's finally yours!

The *official* @fastapi.tiangolo.com extension for VS Code has launched! 🎉

Install: marketplace.visualstudio.com/items?itemNa...
GitHub: github.com/fastapi/fast...

FastAPI Extension - Visual Studio Marketplace Extension for Visual Studio Code - VS Code extension for FastAPI development

Here's a big one! 🎉

Official FastAPI extension for @vscode.dev 🎁

🗺️ Path operations explorer
🔎 ...and search
✅ From tests: go to definition
🎁 And more!

marketplace.visualstudio.com/items?itemNa...

GitHub: github.com/fastapi/fast...

Thank you @savannah.dev 🙌

FastAPI 0.133.1 comes with the official FastAPI Agent Skill bundled 📦️

More important than the current skill content is that it will be kept up to date with new versions of FastAPI 😎

AI coding agents will be able to use best practices and new features as they come 🤖

Strict Content-Type Checking - FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

FastAPI 0.132.0 adds strict Content-Type checking for JSON requests 🏰

This would solve a CSRF risk in local-network apps (apps intended to run on users' machines, on localhost) 🔒️

If your clients don't send a Content-Type, you can also disable it: fastapi.tiangolo.com/advanced/str...

Increase your FastAPI JSON response performance by 2x or more 🚄

1. Upgrade to the just released FastAPI 0.131.0 🎁
2. Declare your response model - return type ✨

With that, now @pydantic.dev handles the JSON serialization on the Rust side 🦀

fastapi.tiangolo.com/advanced/cus...

JSON with Bytes as Base64 - FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

🐛 Here's FastAPI 0.129.1 with a bug fix in the JSON Schema for binary data and file uploads.

📝 And a new guide to use base64 binary data in JSON payloads: fastapi.tiangolo.com/advanced/jso...

FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

The FastAPI docs are now fully translated to:

German
Spanish
French
Japanese
Korean
Portuguese
Russian
Turkish
Ukrainian
Chinese
Traditional Chinese

Done by AI guided by humans and native speakers 🤖

Shoutout to YuriiMotov for handling a lot of this 🙌

fastapi.tiangolo.com

FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

FastAPI 0.129.0 drops support for Python 3.9, which reached its End Of Life months ago 🪓

Make sure you have a recent Python version, ideally 3.14 😎

fastapi.tiangolo.com

GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi

Here's FastAPI 0.128.7 with a couple of bug fixes and small features 🍰

...the plan is to release 0.129.0 today, dropping support for Python 3.9 🪓

github.com/fastapi/fast...

With some finagling, I managed to build @fastapi.tiangolo.com against Python 3.15 to run the new FastAPI pyperformance benchmark, with and without the JIT.

3.13: 142ms → 141ms w/ JIT (~0.7% faster)
3.14: 147ms → 149ms w/ JIT (~1.4% slower)
3.15a5+ (main): 145ms → 134ms w/ JIT (8% faster!!!)

Several FastAPI releases during the weekend and today with internal refactors and a bug fix, the latest is 0.128.6 🤓

GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi

How much do you like Friday releases? 🍫

FastAPI 0.128.3, compatible with the latest (and future) Starlette 🚀

github.com/fastapi/fast...

GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi

Here's FastAPI 0.128.2, with more bug fixes and features 🎁

github.com/fastapi/fast...

FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

FastAPI 0.128.1 comes with with several small bug fixes and features 🍰

fastapi.tiangolo.com

This also includes:

✅ E2E tests
🤖 New pre-commit setup
🔒️Migration from Bcrypt to Argon2 for hashing passwords (while keeping compatibility with existing ones)

The full-stack-fastapi-template now has 40k+ GitHub stars, 0 open PRs, 0 open issues 🤯

To celebrate: version 0.10.0 🥂

Highlight: alejsdev set it up as a uv workspace, and a bun monorepo, now all works from the top level 🚀

github.com/fastapi/full...

LLMs and other tools are great, use them wisely 🧙

fastapi.tiangolo.com/contributing...

Development - Contributing - FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

The FastAPI docs are now FULLY translated to multiple languages, always up to date 🌐

LLMs, carefully guided by the FastAPI team plus native speakers 🤖🙋

Spanish - @tiangolo.com
German - Nils Lindemann
Russian - Yurii Motov
Portuguese - Rafael Marques

fastapi.tiangolo.com/contributing...

FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

FastAPI 0.128.0 drops support for pydantic.v1 ⚰️

Now only @pydantic.dev v2 is supported ⬆️

This will unlock many things ✨

fastapi.tiangolo.com

FastAPI FastAPI framework, high performance, easy to learn, fast to code, ready for production

Here's FastAPI 0.127.1 🔖

It adds a custom deprecation warning to make sure you see any deprecated code and update it 🔊

fastapi.tiangolo.com

FastAPI 0.127.0 raises a deprecation warning if you use pydantic.v1 🔊

Support for pydantic.v1 will be fully dropped next ☕️

You should (and probably are) using @pydantic.dev v2 ✨

FastAPI 0.126.0 drops support for Pydantic v1 ⚰️

The minimum version is now @pydantic.dev >= 2.7.0 ⬆️

Importing from pydantic.v1 is still temporarily supported, but will no longer be supported in a future release in the next few days. 🔥

GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi

FastAPI 0.125.0 drops support for Python 3.8 ⚰️

github.com/fastapi/fast...

GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi

Bug fix releases: FastAPI 0.124.3 and 0.124.4 🐛

The highlight: YuriiMotov fixed support for @pydantic.dev aliases (validation and serialization) in multiple edge cases. 🚀

If there are no new reports, FastAPI will drop support for Python 3.8 next week. ⚰️

github.com/fastapi/fast...

GitHub - fastapi/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production FastAPI framework, high performance, easy to learn, fast to code, ready for production - fastapi/fastapi

A couple of bug-fix releases, FastAPI 0.124.1 and 0.124.2 🐛

github.com/fastapi/fast...