CopilotKit

CopilotKit is the Agentic Application Platform — an open source framework and cloud service for building AI-powered agentic applications. It connects your app's logic, state, UI, and context to agentic backends to power interactive experiences across embedded UIs and headless interfaces. CopilotKit enables developers to build, deploy, and monitor AI features that feel intuitive and deeply integrated into user-facing applications.

• Generative UI renders agent state, progress, outputs, and tool calls with custom UI components in real-time, bridging the gap between AI agents and user interfaces
• Human in the Loop (HITL) empowers users to guide agents at key checkpoints, combining AI and human judgment for more reliable and controllable agent behavior
• Shared State keeps your agent and app in sync, allowing agents to see everything in your app while your app reacts to agent actions in real-time
• Agentic Chat UI provides built-in chat components for building conversational AI interfaces with customizable look and feel
• Frontend Actions let agents interact with and control your frontend application directly
• Backend Actions connect your agents to backend services and APIs seamlessly
• Copilot Suggestions auto-generate contextual suggestions based on real-time application state
• Custom Look and Feel allows full customization of CopilotKit's UI components including headless UI options
• Observability provides comprehensive monitoring hooks for your CopilotKit application
• Inspector enables real-time debugging and inspection of your CopilotKit application

To get started, run npx copilotkit@latest init to bootstrap your NextJS application with CopilotKit. The framework supports multiple agentic protocols including AG-UI (Agents to Users), MCP (Agents to Tools), and A2A (Agents to Agents). CopilotKit integrates with prominent agent frameworks like LangGraph, AutoGen2, CrewAI, LlamaIndex, Mastra, and Pydantic AI through the AG-UI protocol. By decoupling from specific frameworks, models, or agent protocols, CopilotKit lets you evolve your AI stack without redesigning your app's UX.