ag-ui-protocol/ag-ui

Health v2 · maintenance only

Adoption not part of the score

15562 stars · 1405 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

AG-UI is an open, lightweight, event-based protocol that standardizes how AI agent backends connect to user-facing frontend applications. It defines ~16 standard event types, a flexible middleware layer supporting any event transport (SSE, WebSockets, webhooks), and ships SDKs plus a reference HTTP implementation for building agentic user experiences.

Use cases

• connect ai agents to frontend applications
• stream agent events to a user interface
• build a chat interface backed by an agent backend
• standardize agent state and ui intent communication
• integrate generative ui components with agents
• build a terminal cli agent client
• wire an agentic backend into a web app without ad-hoc code

When to choose

• you need a standardized, transport-agnostic event protocol between agents and UIs
• you want interoperability across agent frameworks and frontend clients
• you are building real-time, interactive agentic features in web or chat apps
• you want to support generative UI specs like A2UI, MCP-UI, or Open-JSON-UI

When to avoid

• you only need agent-to-tool connections (use MCP instead)
• you need agent-to-agent coordination (use A2A instead)
• you need a fully rendered UI out of the box rather than a protocol layer
• your project has no agentic or LLM component

Facets

framework · maturity active

agent-framework middleware websocket http-server sdk chat-interface large-language-models web-development frontend apis developer-tools python cross-platform cli agent-user-interaction event-based-protocol agentic-frontend generative-ui protocol-standard real-time-events copilotkit ai-agents nodejs web-server

Member repositories

For agents

markdown · JSON · MCP: product_card(name="ag-ui-protocol/ag-ui")