MCP Apps
Hacker ApprovedShares rank 4 of 7 agent communication protocols by recommenders
Lets MCP servers provide interactive UI components inside chat apps, making connectors usable there. Critics say it may splinter the MCP ecosystem and is still immature.
Lets MCP servers provide interactive UI components inside chat apps, making connectors usable there. Critics say it may splinter the MCP ecosystem and is still immature.
13 people gave an opinion
- recommend it
- 10
- criticize it
- 3
- approval share
- 77%
Recommended in 5 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it carries the badge
- 10 people recommend itNeeds 10 or more, met.
- 3.3 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 5 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Interactive UI inside chat apps
“MCP Apps are the only way to build a connector that's actually usable from inside the Claude and ChatGPT apps.”
Comment from 4 Sep 2026 in “Ask HN: Who is using MCP in production?” “a specification for how third-party apps can generate UI components in their response”
Comment from 9 Jan 2026 in “MCP Is a Fad” Seen as where MCP is heading
“Now MCP Apps are here and they could mean way more for MCPs than it seems at first.”
Comment from 24 Feb 2026 in “MCPs just got a front end, and it's a bigger deal than it sounds” “This is where MCP is heading.”
Comment from 2 Dec 2025 in “SEP-1865 MCP Apps Extension sample implementation” Powerful and exciting for MCP
“I'm pretty excited about what this brings to the table as well.”
Comment from 21 Sep 2026 in “MCP was always a bad idea?” “MCP Apps can be extremely powerful”
Comment from 23 Nov 2025 in “MCP Apps: Extending servers with interactive user interfaces”
What people warn about
Each mark is one comment
Seen as serving one vendor's needs
“The approach that OpenAI has taken is not better - it is simply a mechanism to create some sort of app store”
Comment from 23 Nov 2025 in “MCP Apps: Extending servers with interactive user interfaces” “an immature version of a standards extension that mainly caters to their needs”
Comment from 23 Nov 2025 in “MCP Apps: Extending servers with interactive user interfaces”
Other agent communication protocols people recommend
The four most recommended other agent communication protocols, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Murmur by InstaVM | 14 | 0 | 100% | 6 | — | Approved |
| A2A (Agent2Agent) protocol | 14 | 21 | 40% | 5 | — | — |
| GitAgent | 11 | 4 | 73% | 1 | — | — |
| MCP AppsThis page | 10 | 3 | 77% | 5 | — | Approved |
| A2UI | 10 | 8 | 56% | 4 | — | — |
What people said
All 16 comments that mention it, newest first. Each links to the original comment.
“I'm pretty excited about what this brings to the table as well.”
“MCP Apps are the only way to build a connector that's actually usable from inside the Claude and ChatGPT apps.”
“Now MCP Apps are here and they could mean way more for MCPs than it seems at first.”
“MCP Apps are perfect for vibe coding. They solve simple, specific problems.”
“I like that MCP Apps just offer tools, and AI doesn't have to deal with JSON and generative UI”
“were great starting points, but they're designed for human developers”
“a specification for how third-party apps can generate UI components in their response”
“much prefer the more incremental”
“This is where MCP is heading.”
“MCP Apps can be extremely powerful”
“The approach that OpenAI has taken is not better - it is simply a mechanism to create some sort of app store”
“an immature version of a standards extension that mainly caters to their needs”
“this has a significant risk of splintering the MCP ecosystem further”
“it's actually not where we want to go”
“I think this is a meaningful step in the direction of getting more people who'll never know or care about MCP to get value out of MCP.”
“This feels like the answer to that problem.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.