starlette

Build asynchronous web services with Starlette's ASGI toolkit and uvicorn.

682|49|Updated Oct 20, 2025

Search Tags:#routing #middleware #async #starlette #websockets #asgi #web-framework

Ready to run

npx skills add https://github.com/simonw/research --skill starlette

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: starlette
Source: https://github.com/simonw/research/tree/main/starlette-1-skill
Command: npx skills add https://github.com/simonw/research --skill starlette

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Starlette provides a lightweight ASGI toolkit for building high-performance async web services in Python.

Core Features & Use Cases

Routing, requests/responses, and WebSockets
Templates, static files, middleware, and lifespan events
Background tasks and modular ASGI usage (pure toolkit)
OpenAPI/schema generation and integration with uvicorn for serving apps

Quick Start

Create a minimal Starlette app with Route and run it with uvicorn to serve an async API.

Frequently Asked Questions about starlette

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I build a fast async web service using an ASGI toolkit?▼

Build fast async web services using a lightweight ASGI toolkit by defining routing, requests, and responses. It requires Python 3.10+ and minimal dependencies to create production-grade APIs.

Can I handle WebSockets and background tasks with Starlette?▼

Yes, Starlette supports WebSockets and background tasks. You can handle real-time WebSockets alongside templates, static files, and middleware within a single lightweight ASGI application.

Does Starlette require uvicorn to serve async web applications?▼

Starlette is a pure ASGI toolkit and requires an ASGI server like uvicorn to serve async web applications. The integration with uvicorn is demonstrated for running your fast async APIs.

How do I generate OpenAPI schemas for my async web routes?▼

Generate OpenAPI schemas for your async web routes using the built-in OpenAPI support. Starlette provides schema generation alongside routing and middleware for production-grade APIs.

What is the best way to manage lifespan events and middleware in an ASGI app?▼

Manage lifespan events and middleware in an ASGI app by utilizing Starlette's modular toolkit. It handles lifespan events, custom middleware, and background tasks for scalable web services.