Modal Web Serving

Use this skill when exposing Modal Functions as web endpoints, building APIs, or serving web applications.

For Servers (@app.server / modal.Server) — long-lived port-based HTTP with regional routing and default proxy-token auth — see modal-servers. For managed OpenAI-compatible LLM APIs, see modal-endpoints.

When to Use This Skill

• Creating REST/HTTP APIs from Modal Functions
• Serving ML model inference over HTTP
• Building web apps with FastAPI, Django, or Flask on Modal
• Setting up streaming (SSE) endpoints
• Configuring custom domains
• Adding authentication to web endpoints

Quick Start

image = modal.Image.debian_slim().pip_install("fastapi[standard]")