A React TypeScript application for connecting to multiple MCP (Model Context Protocol) servers and providing a conversational interface with tool calling capabilities.

• 🔗 Multi-server MCP connections (HTTP/SSE transports)
• 🤖 Inference provider abstraction (starting with OpenRouter)
• 💬 Conversational interface with agent loops
• 🛠️ Real-time tool call visualization
• 🔍 MCP debugging and message tracing
• 📱 Responsive UI with left sidebar and chat interface

• Node.js (v18 or higher)
• npm, yarn, or pnpm

1. Install dependencies:

   npm install

2. Start the development server:

   npm run dev

3. Open http://localhost:3000 in your browser

• npm run dev - Start development server
• npm run build - Build for production
• npm run preview - Preview production build
• npm run lint - Run ESLint
• npm run test - Run tests
• npm run test:ui - Run tests with UI

The application is built with a modular architecture using React hooks and providers:

• InferenceProvider - Abstraction for LLM inference (OpenRouter, etc.)
• MCPProvider - Multi-server MCP connection management
• AgentLoop - Tool calling and conversation flow
• UI Components - Modular, reusable interface components

• React 18 with TypeScript
• Vite for build tooling
• Tailwind CSS for styling
• MCP TypeScript SDK for protocol implementation
• Vitest for testing

This is an active development project serving as both:

• A public example implementation of MCP client features
• A prototyping testbed for MCP protocol changes