Readit News logoReadit News
mercury24aug commented on MCP Apps: Extending servers with interactive user interfaces   blog.modelcontextprotocol... · Posted by u/mercury24aug
mindwok · 3 months ago
It'll be interesting to see how this goes, but my first impression is that it's actually not where we want to go. One of the cool things about MCP (or even just tool calling) is that the LLM on top of a tool provides a highly flexible and dynamic interface to traditionally static tools.

I love being able to type "make an iptables rule that opens 443" instead of having to dig out the man page and remember how to do that. IMO the next natural extension of this is giving the LLM more capability to generate user interfaces so I can interact with stuff exactly bespoke to my task.

This on the other hand seems the other way round, it's like bolting a static interface onto the LLM, which could defeat the purpose of the LLM interface layer in the first place right?

mercury24aug · 3 months ago
Giving LLM the ability to generate UI is a cool concept, but our models are not there yet. MCP Apps can be extremely powerful, for example, you can play Doom inside ChatGPT: https://x.com/rauchg/status/1978235161398673553?s=20

I don't think we can generate anywhere close to this kind of UI just yet.

We built https://usefractal.dev/ to make it easier for people to build ChatGPT Apps (they are technically MCP Apps) so I have seen the use cases. Most of these use cases LLM cannot generate the UI on the fly.

mercury24aug commented on MCP Apps: Extending servers with interactive user interfaces   blog.modelcontextprotocol... · Posted by u/mercury24aug
stingraycharles · 3 months ago
Unless the MCP server itself has an LLM call inside of it (rare), the MCP server is pretty deterministic. It’s the AI that invokes it that’s actually indeterministic, but the user is already using that.
mercury24aug · 3 months ago
This is a very strict definition of MCP. An agent (with LLM call inside) can be an MCP. Event a UI component can be an MCP.
mercury24aug commented on MCP Apps: Extending servers with interactive user interfaces   blog.modelcontextprotocol... · Posted by u/mercury24aug
iLoveOncall · 3 months ago
Who wants a button that has indeterministic actions?
mercury24aug · 3 months ago
AI fills in a form, and you want to adjust the form before clicking submit. How often do you have to adjust AI's answer vs accepting it as is
mercury24aug commented on MCP Apps: Extending servers with interactive user interfaces   blog.modelcontextprotocol... · Posted by u/mercury24aug
mercury24aug · 3 months ago
Looks like OpenAI, Anthropic, and the MCP-UI team actually worked together on a common standard for MCP Apps: https://blog.modelcontextprotocol.io/posts/2025-11-21-mcp-ap...

Honestly, I think the biggest friction for MCP adoption has been how un-userfriendly it is. It’s great for devs, but not the average users. Users don't always want to chat, sometimes they just want to click a button or adjust a slider. This feels like the answer to that problem.

Full disclosure, I'm partial here because of our work at https://usefractal.dev. We were early adopters when MCP first came out, but we always felt like something was missing. We kept wishing for a UI layer on top, and everyone says it's gonna take forever for the industry to adopt, maybe months, maybe years.

I cannot believe the adoption comes so quickly. I think this is gonna be huge. What do you guys think?

mercury24aug commented on Show HN: OpenAI hasn't released their Apps SDK so we did   github.com/fractal-mcp/sd... · Posted by u/mercury24aug
realtimex · 4 months ago
+1 star. Super easy to add ui-rich widgets to chat. It took me 5 minutes to add weather widget to realtimex.ai
mercury24aug · 4 months ago
Thank you so much! I'm glad you like it
mercury24aug commented on Apps SDK   developers.openai.com/app... · Posted by u/alvis
mercury24aug · 4 months ago
It's funny how OpenAI announced Apps SDK without the SDK. Anyway, we was so excited to get my hands dirty that we built our own SDK: https://github.com/fractal-mcp/sdk
mercury24aug commented on My startup failed, and this is what it feels like   medium.com/@nikkidurkin99... · Posted by u/wbharding
instakill · 12 years ago
This comment is completely unwarranted. Accounts like your should be banned.
mercury24aug · 12 years ago
This account was created 4hr ago just to write negative comments on this thread.

Deleted Comment

u/mercury24aug

KarmaCake day72October 1, 2013View Original