Shypd.aiThe largest open index of AI toolsext-apps is an open-source Coding & Development tool that provides a standard for UIs embedded in AI chatbots. It enables developers to build interactive UIs for MCP tools that render inline in chat clients like Claude and ChatGPT.
Trending
Also listed in
About
ext-apps is the official repository for the specification and SDK of the Model Context Protocol (MCP) Apps protocol, offering a standardized way to deliver interactive UIs from MCP servers directly within AI chatbots. This tool allows developers to create dynamic user interfaces such as charts, forms, and dashboards that render inline in compliant chat clients like Claude and ChatGPT. It extends the core MCP specification by enabling tools to declare UI resources, which the host then fetches and displays in a sandboxed iframe, facilitating bidirectional communication. The SDK supports app developers building interactive Views, host developers embedding these Views, and MCP server authors registering tools with UI metadata. It includes agent skills to scaffold new apps, migrate existing OpenAI apps, and convert web apps to hybrid web + MCP Apps.
Capabilities
Pricing & Plans
Open Source
Free
FAQs
Trending
