FastAPI
Build APIs with FastAPI, a Python framework described as easy to learn and ready for production.
About FastAPI
FastAPI is a modern, high-performance Python web framework for building APIs, constructed using standard Python type hints. It is designed to be easy to learn, fast to code, and production-ready, with performance comparable to NodeJS and Go, enabled by the Starlette and Pydantic libraries.
The framework adheres to open API standards including OpenAPI (formerly Swagger) and JSON Schema, and includes built-in interactive documentation. It natively supports common API functionality such as CORS, background tasks, WebSockets, SQL relational database integration, static file serving, and Jinja2 templating.
Key features
- High performance comparable to NodeJS and Go
- Built on standard Python type hints
- Automatic interactive OpenAPI documentation
- Native support for CORS, WebSockets, background tasks
- Integrated SQL relational database support
- Built-in static file serving and Jinja2 templating
Best for: Python developers building production-ready APIs who prioritize fast development, type safety, and high performance.
Good for
- High performance comparable to NodeJS and Go
- Designed to reduce code duplication and developer-induced errors
- Includes built-in interactive documentation and OpenAPI compliance
FastAPI at a glance
- Website
- fastapi.tiangolo.com
- Category
- Development › APIs & Databases
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for APIs & Databases
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FastAPI FAQ
What is FastAPI built on?
FastAPI is built on standard Python type hints, with performance supported by Starlette and Pydantic.
What open API standards does FastAPI comply with?
FastAPI is fully compatible with OpenAPI (formerly Swagger) and JSON Schema open standards for APIs.
What common API features are included natively?
Native features include CORS support, background tasks, WebSockets, SQL database integration, static files, and Jinja2 templating.
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