modelcontextprotocol/ext-apps
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ext-apps/README.md
Olivier Chafik 9875d276be
 Update README.md
2025-11-21 19:02:11 +00:00

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@modelcontextprotocol/ext-apps

This repo contains the SDK and specification for MCP Apps Extension (SEP-1865).

MCP Apps are a standard inspired by OpenAI's Apps SDK and MCP-UI to allow MCP Servers to display interactive UI elements in conversational MCP clients / chatbots.

Installation

This repo is in flux and isn't published to npm (when it is, we'll probably use the @modelcontextprotocol/ext-apps package). Please install it from git for now:

npm install git+https://github.com/modelcontextprotocol/ext-apps.git

Development Notes

Build tools in dependencies

The build tools (esbuild, tsx, typescript) are in dependencies rather than devDependencies. This is intentional: it allows the prepare script to run when the package is installed from git, since npm doesn't install devDependencies for git dependencies.

Once the package is published to npm with pre-built dist/, these can be moved back to devDependencies.