# fastapi

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

- **URL**: https://www.freshcrate.ai/projects/fastapi
- **Author**: pypi
- **Category**: Frameworks
- **Latest version**: `0.136.3` (2026-05-23)
- **License**: Unknown
- **Source**: https://github.com/fastapi/fastapi
- **Homepage**: https://pypi.org/project/fastapi/
- **Language**: Python
- **GitHub**: 97,486 stars, 9,111 forks
- **Registry**: pypi (`fastapi`)
- **Tags**: `pypi`

## Description

<p align="center">
  <a href="https://fastapi.tiangolo.com"><img src="https://fastapi.tiangolo.com/img/logo-margin/logo-teal.png" alt="FastAPI"></a>
</p>
<p align="center">
    <em>FastAPI framework, high performance, easy to learn, fast to code, ready for production</em>
</p>
<p align="center">
<a href="https://github.com/fastapi/fastapi/actions?query=workflow%3ATest+event%3Apush+branch%3Amaster">
    <img src="https://github.com/fastapi/fastapi/actions/workflows/test.yml/badge.svg?event=push&branch=master" alt="Test">
</a>
<a href="https://coverage-badge.samuelcolvin.workers.dev/redirect/fastapi/fastapi">
    <img src="https://coverage-badge.samuelcolvin.workers.dev/fastapi/fastapi.svg" alt="Coverage">
</a>
<a href="https://pypi.org/project/fastapi">
    <img src="https://img.shields.io/pypi/v/fastapi?color=%2334D058&label=pypi%20package" alt="Package version">
</a>
<a href="https://pypi.org/project/fastapi">
    <img src="https://img.shields.io/pypi/pyversions/fastapi.svg?color=%2334D058" alt="Supported Python versions">
</a>
</p>

---

**Documentation**: [https://fastapi.tiangolo.com](https://fastapi.tiangolo.com)

**Source Code**: [https://github.com/fastapi/fastapi](https://github.com/fastapi/fastapi)

---

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](#performance).
* **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. <dfn title="also known as auto-complete, autocompletion, IntelliSense">Completion</dfn> 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](https://github.com/OAI/OpenAPI-Specification) (previously known as Swagger) and [JSON Schema](https://json-schema.org/).

<small>* estimation based on tests conducted by an internal development team, building production applications.</small>

## Sponsors

<!-- sponsors -->
### Keystone Sponsor

<a href="https://fastapicloud.com" target="_blank" title="FastAPI Cloud. By the same team behind FastAPI. You code. We Cloud."><img src="https://fastapi.tiangolo.com/img/sponsors/fastapicloud.png"></a>

### Gold and Silver Sponsors

<a href="https://blockbee.io?ref=fastapi" target="_blank" title="BlockBee Cryptocurrency Payment Gateway"><img src="https://fastapi.tiangolo.com/img/sponsors/blockbee.png"></a>
<a href="https://github.com/scalar/scalar/?utm_source=fastapi&utm_medium=website&utm_campaign=main-badge" target="_blank" title="Scalar: Beautiful Open-Source API References from Swagger/OpenAPI files"><img src="https://fastapi.tiangolo.com/img/sponsors/scalar.svg"></a>
<a href="https://www.propelauth.com/?utm_source=fastapi&utm_campaign=1223&utm_medium=mainbadge" target="_blank" title="Auth, user management and more for your B2B product"><img src="https://fastapi.tiangolo.com/img/sponsors/propelauth.png"></a>
<a href="https://zuplo.link/fastapi-gh" target="_blank" title="Zuplo: Deploy, Secure, Document, and Monetize your FastAPI"><img src="https://fastapi.tiangolo.com/img/sponsors/zuplo.png"></a>
<a href="https://liblab.com?utm_source=fastapi" target="_blank" title="liblab - Generate SDKs from FastAPI"><img src="https://fastapi.tiangolo.com/img/sponsors/liblab.png"></a>
<a href="https://docs.render.com/deploy-fastapi?utm_source=deploydoc&utm_medium=referral&utm_campaign=fastapi" target="_blank" title="Deploy & scale any full-stack web app on Render. Focus on building apps, not infra."><img src="https://fastapi.tiangolo.com/img/sponsors/render.svg"></a>
<a href="https://www.coderabbit.ai/?utm_source=fastapi&utm_medium=badge&utm_campaign=fastapi" target="_blank" title="Cut Code Review Time & Bugs in Half with CodeRabbit"><img src="https://fastapi.tiangolo.com/img/sponsors/coderabbit.png"></a>
<a href="https://subtotal.com/?utm_source=fastapi&utm_medium=sponsorship&utm_campaign=open-source" target="_blank" title="The Gold Standard in Retail Account Linking"><img src="https://fastapi.tiangolo.com/img/sponsors/subtotal.svg"></a>
<a href="https://docs.railway.com/guides/fastapi?utm_medium=integration&utm_source=docs&utm_campaign=fastapi" target="_blank" title="Deploy enterprise applications at startup speed"><img src="https://fastapi.tiangolo.com/img/sponsors/railway.png"></a>
<a href="https://serpapi.com/?utm_source=fastapi_website" target="_blank" title="SerpApi: Web Search API"><img src="https://fastapi.tiangolo.com/img/sponsors/s

## Recent releases

| Version | Date | Urgency | Changes |
| --- | --- | --- | --- |
| `0.136.3` | 2026-05-23 | High | ### Refactors  * ♻️ Do not accept underscore headers when using `convert_underscores=True` (the default). PR [#15589](https://github.com/fastapi/fastapi/pull/15589) by [@tiangolo](https://github.com/tiangolo). |
| `0.136.1` | 2026-04-23 | High | ### Upgrades  * ⬆️ Update Pydantic v2 code to address deprecations. PR [#15101](https://github.com/fastapi/fastapi/pull/15101) by [@svlandeg](https://github.com/svlandeg).  ### Internal  * 🔨 Tweak translation script. PR [#15174](https://github.com/fastapi/fastapi/pull/15174) by [@YuriiMotov](https://github.com/YuriiMotov). * ⬆ Bump mkdocs-material from 9.7.1 to 9.7.6. PR [#15408](https://github.com/fastapi/fastapi/pull/15408) by [@dependabot[bot]](https://github.com/apps/dependabot). * |
| `0.136.0` | 2026-04-21 | Low | Imported from PyPI (0.136.0) |
| `0.135.4` | 2026-04-16 | High | ### Refactors  * 🔥 Remove April Fool's `@app.vibe()` 🤪. PR [#15363](https://github.com/fastapi/fastapi/pull/15363) by [@tiangolo](https://github.com/tiangolo).  ### Internal  * ⬆ Bump cryptography from 46.0.5 to 46.0.7. PR [#15314](https://github.com/fastapi/fastapi/pull/15314) by [@dependabot[bot]](https://github.com/apps/dependabot). * ⬆ Bump strawberry-graphql from 0.307.1 to 0.312.3. PR [#15309](https://github.com/fastapi/fastapi/pull/15309) by [@dependabot[bot]](https://github.com/ |
| `0.135.3` | 2026-04-01 | Medium | ### Features  * ✨ Add support for `@app.vibe()`. PR [#15280](https://github.com/fastapi/fastapi/pull/15280) by [@tiangolo](https://github.com/tiangolo).     * New docs: [Vibe Coding](https://fastapi.tiangolo.com/advanced/vibe/).  ### Docs  * ✏️ Fix typo for `client_secret` in OAuth2 form docstrings. PR [#14946](https://github.com/fastapi/fastapi/pull/14946) by [@bysiber](https://github.com/bysiber).  ### Internal  * 👥 Update FastAPI People - Experts. PR [#15279](https://github.com/fa |
| `0.135.2` | 2026-03-23 | Medium | ### Upgrades  * ⬆️ Increase lower bound to `pydantic >=2.9.0.` and fix the test suite. PR [#15139](https://github.com/fastapi/fastapi/pull/15139) by [@svlandeg](https://github.com/svlandeg).  ### Docs  * 📝 Add missing last release notes dates. PR [#15202](https://github.com/fastapi/fastapi/pull/15202) by [@tiangolo](https://github.com/tiangolo). * 📝 Update docs for contributors and team members regarding translation PRs. PR [#15200](https://github.com/fastapi/fastapi/pull/15200) by [@Yu |
| `0.135.1` | 2026-03-01 | Low | ### Fixes  * 🐛 Fix, avoid yield from a TaskGroup, only as an async context manager, closed in the request async exit stack. PR [#15038](https://github.com/fastapi/fastapi/pull/15038) by [@tiangolo](https://github.com/tiangolo).  ### Docs  * ✏️ Fix typo in `docs/en/docs/_llm-test.md`. PR [#15007](https://github.com/fastapi/fastapi/pull/15007) by [@adityagiri3600](https://github.com/adityagiri3600). * 📝 Update Skill, optimize context, trim and refactor into references. PR [#15031](https:/ |
| `0.135.0` | 2026-03-01 | Low | ### Features  * ✨ Add support for Server Sent Events. PR [#15030](https://github.com/fastapi/fastapi/pull/15030) by [@tiangolo](https://github.com/tiangolo).     * New docs: [Server-Sent Events (SSE)](https://fastapi.tiangolo.com/tutorial/server-sent-events/). |
| `0.134.0` | 2026-02-27 | Low | ### Features  * ✨ Add support for streaming JSON Lines and binary data with `yield`. PR [#15022](https://github.com/fastapi/fastapi/pull/15022) by [@tiangolo](https://github.com/tiangolo).     * This also upgrades Starlette from `>=0.40.0` to `>=0.46.0`, as it's needed to properly unrwap and re-raise exceptions from exception groups.     * New docs: [Stream JSON Lines](https://fastapi.tiangolo.com/tutorial/stream-json-lines/).     * And new docs: [Stream Data](https://fastapi.tiangolo.com/a |
| `0.133.1` | 2026-02-25 | Low | ### Features  * 🔧 Add FastAPI Agent Skill. PR [#14982](https://github.com/fastapi/fastapi/pull/14982) by [@tiangolo](https://github.com/tiangolo).     * Read more about it in [Library Agent Skills](https://tiangolo.com/ideas/library-agent-skills/).  ### Internal  * ✅ Fix all tests are skipped on Windows. PR [#14994](https://github.com/fastapi/fastapi/pull/14994) by [@YuriiMotov](https://github.com/YuriiMotov). |

## Citation

- HTML: https://www.freshcrate.ai/projects/fastapi
- Markdown: https://www.freshcrate.ai/projects/fastapi.md
- Dependencies JSON: https://www.freshcrate.ai/api/projects/fastapi/deps

_Generated by freshcrate.ai. Indexes pypi releases for AI-agent ecosystem packages._