sunpeak

sunpeak is an open-source framework designed to help developers create interactive applications, known as MCP Apps, that run directly within AI hosts like ChatGPT and Claude. It addresses the challenges of building, testing, and deploying these embedded user interfaces, providing a streamlined environment for developing rich, dynamic experiences inside AI conversations.

Key features include a local simulator that lets you test MCP Apps without needing a paid ChatGPT account, replicating the AI host's runtime for accurate testing. A development server with hot reloading ensures rapid iteration, while pre-built UI components simplify design. The framework also integrates automated testing with Vitest and Playwright, ensuring your apps are robust and reliable.

This framework is ideal for developers looking to extend the capabilities of AI chatbots with custom UIs, forms, charts, or other interactive elements. Common use cases involve creating tools that allow users to interact with data or perform actions directly within their ChatGPT or Claude conversations, enhancing the utility and user experience of AI-powered applications.