MCP Apps is a specification and SDK for building interactive user interfaces that render inline in AI chat clients like Claude and ChatGPT.
The project addresses the need to display rich, interactive content from Model Context Protocol tools within chat interfaces. It provides a standard protocol that allows MCP servers to define interactive UIs—charts, forms, dashboards—that render natively in compliant chat clients rather than as plain text responses. The approach works by establishing a specification that both servers and clients implement, enabling seamless rendering of these interfaces across different chat platforms.
Developers should adopt this tool if they are building MCP servers and want their tools to present interactive interfaces to users. It suits projects where the output benefits from visual presentation or user interaction rather than text-only responses. The project provides Agent Skills that can scaffold new MCP Apps, migrate existing applications, add UI to existing MCP servers, or convert web apps to support the MCP Apps protocol, making adoption straightforward for different starting points.
The project maintains active engagement with its user base, with nearly all open issues originating from external adopters rather than the core team, indicating substantial real-world usage. Maintainers respond to new issues and pull requests within a few days. Work in the issue tracker centers on enhancements, bug fixes, and protocol-related discussions.
