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Ext Apps

Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers

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At a glance.

A compact read before the deeper capability notes and official setup links.

Feature cards focus on what the tool helps users do, not generated setup commands.

Build interactive UIs for MCP tools — charts, forms, dashboards — that render inline in Claude, ChatGPT and any other compliant chat client.

. Excalidraw built with MCP Apps, running in Claude

The fastest way to build an MCP App is to let your AI coding agent do it.

create-mcp-app Scaffolds a new MCP App with an interactive UI from scratch "Create an MCP App"

migrate-oai-app Converts an existing OpenAI App to use MCP Apps "Migrate from OpenAI Apps SDK"

add-app-to-server Adds interactive UI to an existing MCP server's tools "Add UI to my MCP server"

convert-web-app Turns an existing web app into a hybrid web + MCP App "Add MCP App support to my web app"

Other agents — any AI coding agent that supports

This panel keeps technical format separate from the user-facing AI category.

Tool type SDK

Use categories search

Works with Codex, Claude Code, Generic

Generated install snippets are intentionally not mirrored here because they drift. The page links to source-owned setup docs instead.

These notes help a user decide whether to investigate the official project further.

Source repository last pushed at 2026-05-15T18:02:51Z.

Generated from source metadata; confirm operational details in the official project before adopting it.

Review the upstream license, maintenance activity, and issue history before using it in production.

Trusted source