AG-UI is an open, lightweight, event-based protocol that standardizes how AI agents connect to user-facing applications. Built for simplicity and flexibility, it enables seamless integration between AI agents, real time user context, and user interfaces.

Join our Discord → Read the Docs → Go to the AG-UI Dojo → Follow us →

Create a new AG-UI application in seconds:

npx create-ag-ui-app my-agent-app

• The AG-UI Dojo
• Build AG-UI-powered applications(Quickstart)
• Build new AG-UI framework integrations (Quickstart)
• Book a call to discuss an AG-UI integration with a new framework
• Join the Discord Community

AG-UI is an open, lightweight, event-based protocol for agent-human interaction, designed for simplicity & flexibility:

• During agent executions, agent backends emit events compatible with one of AG-UI's ~16 standard event types
• Agent backends can accept one of a few simple AG-UI compatible inputs as arguments

AG-UI includes a flexible middleware layer that ensures compatibility across diverse environments:

• Works with any event transport (SSE, WebSockets, webhooks, etc.)
• Allows for loose event format matching, enabling broad agent and app interoperability

It also ships with a reference HTTP implementation and default connector to help teams get started fast.

Learn more about the specs →

AG-UI was developed based on real-world requirements and practical experience building in-app agent interactions.

AG-UI is complementary to the other 2 top agentic protocols

• MCP gives agents tools
• A2A allows agents to communicate with other agents
• AG-UI brings agents into user-facing applications

• 💬 Real-time agentic chat with streaming
• 🔄 Bi-directional state synchronization
• 🧩 Generative UI and structured messages
• 🧠 Real-time context enrichment
• 🛠️ Frontend tool integration
• 🧑‍💻 Human-in-the-loop collaboration

AG-UI was born from CopilotKit's initial partnership with LangGraph and CrewAI - and brings the incredibly popular agent-user-interactivity infrastructure to the wider agentic ecosystem.

1st party = the platforms that have AG‑UI built in and provide documentation for guidance.

View all supported integrations →

Video:

https://agui-demo.vercel.app/

The AG-UI Dojo demonstrates AG-UI's core building blocks through simple, focused examples—each just 50-200 lines of code.

View the source code for the Dojo and all framework integrations here.

Check out the Contributing guide

• Bi-Weekely AG-UI Working Group 📅 Follow the CopilotKit Luma Events Calendar

Check out the AG-UI Roadmap to see what's being built and where you can jump in.

AG-UI is open source software licensed as MIT.