ag-ui-protocol/ag-ui

Project overview

It targets the agent-to-user interaction layer specifically, complementing MCP for tools and A2A for agent-agent communication by defining roughly sixteen standard event types that any frontend or agent runtime can consume.

Project type

AI Agent

Deployment

Refer to project documentation

License

MIT

Best for

• Developers and AI engineers who need to wire agent backends into user-facing frontends and want a standardized event protocol rather than a bespoke integration.
• Enterprise teams building agent-powered applications that require human-in-the-loop collaboration, generative UI, or structured messaging between agents and end users.

Key capabilities

• Standardizes agent-to-user-interaction via ~16 standard event types emitted during agent executions.
• Ensures compatibility across diverse environments by working with any event transport (SSE, WebSockets, webhooks) and allowing loose event format matching.
• Ships with a reference HTTP implementation and default connector to help teams get started fast.
• Supports generative UI, structured messages, frontend tool integration, and human-in-the-loop collaboration.

Limitations and risks

• The .NET SDK is currently in progress and not yet available.
• AWS Bedrock Agents integration is in progress and may be unstable; teams evaluating this path should verify behavior before relying on it in production.

Getting started

• Run `npx create-ag-ui-app my-agent-app` to create a new application. The CLI provides a fast setup path and the reference HTTP implementation and default connector help teams establish a working connection.