--- title: MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef description: MCP Apps (formerly MCPUI) is an open protocol extension to MCP that enables interactive, branded UI components to be transmitted and rendered inside AI chat... canonical: https://daily.dev/posts/mcp-apps-extending-the-frontier-ido-salomon-liad-yosef-yxg2i7nql twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef | daily.dev og:description: MCP Apps (formerly MCPUI) is an open protocol extension to MCP that enables interactive, branded UI components to be transmitted and rendered inside AI chat... og:url: https://daily.dev/posts/mcp-apps-extending-the-frontier-ido-salomon-liad-yosef-yxg2i7nql og:image: https://api.daily.dev/og/posts/yxg2i7nQl.png og:image:alt: MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef **[AI Engineer](https://daily.dev/sources/aidotengineer)** · 18 min read · 2 upvotes · 0 comments ## Summary MCP Apps (formerly MCPUI) is an open protocol extension to MCP that enables interactive, branded UI components to be transmitted and rendered inside AI chat clients like Claude, ChatGPT, and VS Code. Instead of returning walls of text from MCP servers, services like PostHog, Shopify, and Hugging Face can send their own UI chunks directly into the chat, preserving brand identity and enabling two-way interaction. The spec standardizes how user events in embedded UIs communicate back to the host agent, which retains control of the user journey. Backed by Anthropic and OpenAI, MCP Apps is already supported by Cursor, GitHub Copilot, ChatGPT, and others. Upcoming features include reusable views, app tools (host-to-app communication), and interoperability with declarative UI standards like A2UI. The speakers frame this as a fundamental shift in how the web is consumed — through personal AI assistants composing UI atoms rather than users navigating full websites. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the MCP Apps specification and how does it work with Claude and ChatGPT? MCP Apps is an official extension to the Model Context Protocol, co-created by the MCPUI team with Anthropic and OpenAI, that lets MCP servers return interactive HTML UI (via an MCP resource) instead of plain text. The host renders that HTML in a sandbox, and user interactions send events back through a callback so the host can decide whether to call a tool. Claude and VS Code supported it at launch; OpenAI later adopted it for ChatGPT apps. _Developers building MCP servers can track MCP Apps adoption and tooling updates on daily.dev._ ### Which companies were early adopters of MCPUI before it became the official MCP Apps spec? 11 Labs, Shopify, and Postman were among the first companies to support MCPUI roughly a year before it became the official MCP Apps spec, and Goose was the first client to support it. Block later built its agentic commerce product on MCP apps, and Goose itself became part of Block's product. _Anyone evaluating agentic commerce or MCP tooling can follow adopter momentum via daily.dev._ ### What are app tools (view tools) being added to the MCP Apps specification? App tools, also called view tools, let the host or chat send instructions back into a rendered app UI, for example filling out a form on the user's behalf, reversing the usual flow where the app talks to the host. This is standardized similarly to Google's web MCP concept and is already part of the spec, with release expected soon alongside reusable view identifiers for heavy apps like 3D renderers. _Teams designing two-way chat-to-app interactions can watch this MCP apps feature land via daily.dev._ ## Similar posts on daily.dev - [MCP Apps: Extending servers with interactive user interfaces](https://daily.dev/posts/mcp-apps-extending-servers-with-interactive-user-interfaces-jtfd053h0) · Hacker News · 1 upvotes · 0 comments - [Agent UI Standards Multiply: MCP Apps and Google’s A2UI](https://daily.dev/posts/agent-ui-standards-multiply-mcp-apps-and-google-s-a2ui-cnovycn6m) · The New Stack · 1 upvotes · 0 comments --- Tags: [#react](https://daily.dev/tags/react), [#ai-agents](https://daily.dev/tags/ai-agents), [#mcp](https://daily.dev/tags/mcp), [#generative-ui](https://daily.dev/tags/generative-ui) [View this post on daily.dev](https://daily.dev/posts/mcp-apps-extending-the-frontier-ido-salomon-liad-yosef-yxg2i7nql) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef","url":"https://daily.dev/posts/mcp-apps-extending-the-frontier-ido-salomon-liad-yosef-yxg2i7nql","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/mcp-apps-extending-the-frontier-ido-salomon-liad-yosef-yxg2i7nql"},"datePublished":"2026-08-02T23:40:45.180Z","dateModified":"2026-09-13T18:42:11.859Z","description":"MCP Apps (formerly MCPUI) is an open protocol extension to MCP that enables interactive, branded UI components to be transmitted and rendered inside AI chat...","image":"https://i.ytimg.com/vi/-jY2T2PiJBE/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/-jY2T2PiJBE/sddefault.jpg","isAccessibleForFree":true,"articleSection":"AI Engineer","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"AI Engineer","logo":"https://media.daily.dev/image/upload/s--u5PucxNT--/f_auto/v1724338940/logos/aidotengineer","url":"https://daily.dev/sources/aidotengineer"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/mcp-apps-extending-the-frontier-ido-salomon-liad-yosef-yxg2i7nql","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"react,ai-agents,mcp,generative-ui","timeRequired":"PT18M","video":{"@type":"VideoObject","name":"MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef","description":"MCP Apps (formerly MCPUI) is an open protocol extension to MCP that enables interactive, branded UI components to be transmitted and rendered inside AI chat...","thumbnailUrl":"https://i.ytimg.com/vi/-jY2T2PiJBE/sddefault.jpg","uploadDate":"2026-08-02T23:40:45.180Z","duration":"PT18M","url":"https://api.daily.dev/r/yxg2i7nQl","embedUrl":"https://www.youtube.com/embed/-jY2T2PiJBE"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"AI Engineer","item":"https://daily.dev/sources/aidotengineer"},{"@type":"ListItem","position":3,"name":"MCP Apps: Extending the Frontier — Ido Salomon & Liad Yosef"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/mcp-apps-extending-the-frontier-ido-salomon-liad-yosef-yxg2i7nql#faq","mainEntity":[{"@type":"Question","name":"What is the MCP Apps specification and how does it work with Claude and ChatGPT?","acceptedAnswer":{"@type":"Answer","text":"MCP Apps is an official extension to the Model Context Protocol, co-created by the MCPUI team with Anthropic and OpenAI, that lets MCP servers return interactive HTML UI (via an MCP resource) instead of plain text. 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