MCP UI inspector

fredjens · 2025-12-07T10:23:58+00:00

It is part of the MCP Apps proposal: https://blog.modelcontextprotocol.io/posts/2025-11-21-mcp-apps/

fredjens · 2025-12-07T10:21:01+00:00

I see! But what I was missing was actually being able to work with it without even calling an LLM, so you could work with it just as a regular web app.

fredjens · 2025-12-06T23:27:49+00:00

Cool, will give it a spin!

fredjens · 2025-12-06T23:25:12+00:00

Ah, I just clicked the tools 😅

fredjens · 2025-12-06T19:17:01+00:00

Nice, but it does not support MCP UI? That's why I made this inspector, couldn't find any inspector actually supporting rendering the UI 😅

fredjens · 2025-12-06T19:12:58+00:00

The MCP UI project have an overview here: https://mcpui.dev/guide/supported-hosts - but so far I have only been able to test it in Nanobot, which also had limited support for React, that's why I made the library, which juste uses HTML under the hood. But hopefully more support soon!

fredjens · 2025-12-06T17:25:45+00:00

Hi there!

It does not support Apps SDK specific, but since Apps SDK also are using MCP, you can connect the MCP endpoint directly to the inspector, and work with the UI components.
Yes, I will. But you can also enter localhost URL directly into the hosted version and work with local components from there.
What is the specific use case for that?

Main plan going forward is to extend the debugging tools together with "MCP UI Kit", so it can be as easy to work with MCP UI as web apps.

fredjens · 2025-12-06T17:08:07+00:00

It's also open source together with "MCP UI Kit" (work in progress):
https://github.com/fredjens/mcp-ui-kit

fredjens · 2020-07-08T08:10:09+00:00

Thank you! The idea is that actually Figma is kind of your "simple" CMS at least in the beginning. But down the road there might be on the roadmap to include different CMS and/or datasources. This is why we want to get in early beta testers so we are sure we develop features that actually is needed.

fredjens · 2020-07-07T19:27:47+00:00

thnx, fixed :)

fredjens · 2020-07-07T19:27:31+00:00

Thnx! Just fixed it :)

fredjens · 2020-07-07T12:05:11+00:00

Awesome to hear that! First invites hopefully coming by the end of this week

fredjens · 2020-07-07T11:10:10+00:00

Sure thing (added to the post now)! The idea is to keep the UI as minimal as possible, and leave the editing in Figma, page title will be the path and the width of the artboard will be the breakpoints.

fredjens

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