Modelcontextprotocol Ext Apps
- 2.6k repo stars
- Updated July 23, 2026
- modelcontextprotocol/ext-apps
Model Context Protocol Ext Apps is a Claude Code plugin that provides the official MCP Apps spec and SDK for embedded chat UIs served by MCP servers.
About
Model Context Protocol Ext Apps is the official Claude Code plugin entry for the MCP Apps protocol—the standard and SDK for embedding interactive UIs in AI chatbots while those interfaces are served by MCP servers. developers shipping agent-first products often need more than text tools: dashboards, forms, and previews inside the conversation. This bundle points you at the canonical spec and creation path rather than a one-off iframe hack. Catalog keywords highlight apps, creating, mcp, and skills. Expect intermediate familiarity with MCP servers, frontend assets, and how your host client loads ext-apps. It is a protocol and SDK focus, not a hosted UI marketplace. Pair it with your backend MCP tools when you are building integrated agent experiences during the product build phase.
- Official MCP Apps specification and SDK repository
- Standard for UIs embedded in AI chatbots served by MCP servers
- Creating MCP Apps called out in catalog keywords alongside mcp and skills
- Community bundle with 1 plugin from modelcontextprotocol/ext-apps
- Bridges MCP tool servers with interactive in-chat user interfaces
Modelcontextprotocol Ext Apps by the numbers
- Data as of Jul 28, 2026 (Skillselion catalog sync)
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| repo stars | ★ 2.6k |
|---|---|
| Last updated | July 23, 2026 |
| Repository | modelcontextprotocol/ext-apps ↗ |
What it does
Install the official MCP Apps plugin to build and serve embedded UIs from MCP servers inside AI chat clients using the MCP Apps spec and SDK.
Who is it for?
Best when you're building agent products and need standardized embedded UIs in Claude-style chat via MCP servers.
Skip if: Skip if you only need REST APIs or simple text MCP tools with no in-chat UI surface.
What you get
After install, you can align with the official MCP Apps protocol and SDK to create server-served interfaces your agent host can embed in chat.
- Alignment with official MCP Apps protocol for in-chat UI
- SDK-guided path to create and expose MCP App experiences from your server
By the numbers
- 1 plugin in bundle
- Official repository modelcontextprotocol/ext-apps
- Catalog keywords: apps, creating, mcp, skills
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MCP Apps protocol and SDK plugin, not a Perplexity research MCP or PRP workflow bundle.
FAQ
Who is Modelcontextprotocol Ext Apps for?
It is for engineers implementing MCP servers who want the official MCP Apps standard for UIs embedded in AI chatbots.
When should I use Modelcontextprotocol Ext Apps?
Use it during Build integrations when you are creating MCP Apps that render interactive UI inside your agent client.
How do I add Modelcontextprotocol Ext Apps to my agent?
Add the modelcontextprotocol/ext-apps Claude Code plugin, then follow the repo spec and SDK to register and serve your MCP App from your server.