fastapi / fastapi

FastAPI framework, high performance, easy to learn, fast to code, ready for production 
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**Documentation**: https://fastapi.tiangolo.com
**Source Code**: https://github.com/fastapi/fastapi
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FastAPI is a modern, fast (high-performance), web framework for building APIs with Python based on standard Python type hints.
The key features are:
* **Fast**: Very high performance, on par with **NodeJS** and **Go** (thanks to Starlette and Pydantic). One of the fastest Python frameworks available.
* **Fast to code**: Increase the speed to develop features by about 200% to 300%. *
* **Fewer bugs**: Reduce about 40% of human (developer) induced errors. *
* **Intuitive**: Great editor support. Completion everywhere. Less time debugging.
* **Easy**: Designed to be easy to use and learn. Less time reading docs.
* **Short**: Minimize code duplication. Multiple features from each parameter declaration. Fewer bugs.
* **Robust**: Get production-ready code. With automatic interactive documentation.
* **Standards-based**: Based on (and fully compatible with) the open standards for APIs: OpenAPI (previously known as Swagger) and JSON Schema.
 * estimation based on tests conducted by an internal development team, building production applications. 
## Sponsors
### Keystone Sponsor
### Gold Sponsors
### Silver Sponsors
Other sponsors
## Opinions
"_[...] I'm using **FastAPI** a ton these days. [...] I'm actually planning to use it for all of my team's **ML services at Microsoft**. Some of them are getting integrated into the core **Windows** product and some **Office** products._"
 Kabir Khan - Microsoft (ref) 
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"_We adopted the **FastAPI** library to spawn a **REST** server that can be queried to obtain **predictions**. [for Ludwig]_"
 Piero Molino, Yaroslav Dudin, and Sai Sumanth Miryala - Uber (ref) 
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"_**Netflix** is pleased to announce the open-source release of our **crisis management** orchestration framework: **Dispatch**! [built with **FastAPI**]_"
 Kevin Glisson, Marc Vilanova, Forest Monsen - Netflix (ref) 
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"_If anyone is looking to build a production Python API, I would highly recommend **FastAPI**. It is **beautifully designed**, **simple to use** and **highly scalable**, it has become a **key component** in our API first development strategy and is driving many automations and services such as our Virtual TAC Engineer._"
 Deon Pillsbury - Cisco (ref) 
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## FastAPI mini documentary
There's a FastAPI mini documentary released at the end of 2025, you can watch it online:
## **Typer**, the FastAPI of CLIs
If you are building a CLI app to be used in the terminal instead of a web API, check out **Typer**.
**Typer** is FastAPI's little sibling. And it's intended to be the **FastAPI of CLIs**. ⌨️ 🚀
## Requirements
FastAPI stands on the shoulders of giants:
* Starlette for the web parts.
* Pydantic for the data parts.
## Installation
First, install `uv`, and then add FastAPI to your project:
 [code] 
**Note**: Make sure you put `"fastapi[standard]"`