Protocol
MCP Apps
Type
Spec
Stars
3.1k
License
None found
Last push
Nov 5, 2026
Source
Official

MCP Apps (ext-apps) MCP Apps spec

by modelcontextprotocol• 3.1k•
MCP AppsSpecTypeScript

Specification and SDK for the MCP Apps extension, with example servers

About MCP Apps (ext-apps)

MCP Apps (ext-apps) is an open-source MCP Apps spec by modelcontextprotocol, written mainly in TypeScript. Specification and SDK for the MCP Apps extension, with example servers. It has 3,061 GitHub stars, and its code was last pushed on Nov 5, 2026.

New to MCP Apps? Our MCP Apps guide explains how it works and lists other projects built on it.

At a glance

Protocol
MCP Apps
Type
Spec
Language
TypeScript
License
None found
GitHub stars
3,061
Last push
Nov 5, 2026

Listed from public GitHub data, checked 2026-11-08. Not scanned by AgenticMart.

Questions about MCP Apps (ext-apps)

What is MCP Apps (ext-apps)?

Specification and SDK for the MCP Apps extension, with example servers It is listed as a MCP Apps spec, maintained in the modelcontextprotocol/ext-apps repository on GitHub.

How do I install MCP Apps (ext-apps)?

The README in modelcontextprotocol/ext-apps has the setup steps. Clone the repository with git clone https://github.com/modelcontextprotocol/ext-apps.git and follow its instructions.

Is MCP Apps (ext-apps) an official MCP Apps project?

Yes. It is published by the organisation that runs MCP Apps or by its official project.

What license does MCP Apps (ext-apps) use?

No standard open-source license was detected. Check the repository before using or redistributing it.

Is MCP Apps (ext-apps) still maintained?

Its code was last pushed on Nov 5, 2026, and it had 3,061 GitHub stars when we checked on 2026-11-08. Look at recent issues and releases in the repository for a fuller picture.

README

This repository has no open-source license we can detect, so we do not republish its README. Read it on GitHub.