Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers
Latest release v2.0.4 · 27 Oct 2026
2 files for Codex, OpenCode and Claude Code: ext-apps AGENTS.md, ext-apps CLAUDE.md — 1,219 tokens loaded in every session.
▶ How to Add Interactive UIs in Claude and ChatGPT via MCP Apps GritAI Studio · about modelcontextprotocol/ext-apps · on YouTube → AGENTS.md A 1,216 tok CLAUDE.md A 3 tok These files are modelcontextprotocol/ext-apps's own configuration — they tell Codex, OpenCode and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.