The Agent-User Interaction Protocol

AG-UI is an open protocol for connecting AI agents to frontend applications. It defines a standard event-based interface for streaming agent state, tool calls, and generative UI to any client.

Concepts

Architecture, events, agents, state, tools, middleware

Quick Start

Build your first AG-UI integration step by step

JavaScript SDK

@ag-ui/core, @ag-ui/client, @ag-ui/encoder

Python SDK

ag_ui.core, ag_ui.encoder

Tutorials

Hands-on guides and debugging walkthroughs

GitHub

Open source · Apache 2.0 · ag-ui-protocol/ag-ui

2 SDKs · 15+ framework adapters · Open protocol