What it does
This MCP server exposes the documentation and example code for assistant-ui, an open-source React library for building chat interfaces. It provides access to component APIs, integration guides for multiple LLM backends (Vercel AI SDK, LangGraph, OpenAI, Anthropic, Google, Mistral, Ollama), and examples of customizable chat primitives including Thread, Message, Composer, and ActionBar. The library includes built-in support for streaming, attachments, markdown rendering, code highlighting, voice dictation, and accessibility features.
Who it's for
Frontend engineers building chat or messaging features in React applications who want production-ready, composable components and straightforward integration with various LLM providers.
Common use cases
- Look up component APIs and composition patterns while building custom chat interfaces
- Reference backend integration examples for your LLM provider (Vercel AI SDK, LangGraph, etc.)
- Find accessibility implementations and keyboard shortcut patterns
- Explore customization examples and Radix-style theming approaches
Setup pitfalls
- CI is not currently passing—review recent commits before relying on the code in production
- High risk class designation reflects filesystem and network access; ensure appropriate sandboxing
- Requires a Node.js environment; verify React version compatibility with your project
- Under active development (last commit 0 days ago); expect rapid iteration and potential breaking changes