---
title: "A2UI"
description: "1 posts about A2UI, summarised, each linking to the original."
---

# A2UI
> 1 posts about A2UI, summarised, each linking to the original.

## Articles

### [A2UI + MCP Apps: Combining the best of declarative and custom agentic UIs](https://yomu.fyi/post/a2ui-mcp-apps-combining-the-best-of-declarative-and-custom-agentic-uis.md)
- Company: [Google](https://yomu.fyi/company/google.md)
- Author: Google A2UI Team, Ido Salomon, Liad Yosef
- Published: Jun 17, 2026
- Type: Explainer

Agentic UIs must balance deep customization with seamless integration: MCP Apps provide standard-web flexibility in an iframe, while A2UI renders declarative JSON through the host application's native components. The post presents three architectural patterns for combining them, including A2UI over MCP, where MCP servers return application/a2ui+json resources for native rendering and can separate static MCP Resources from dynamic Tool calls. This arrangement avoids iframe-related visual fragmentation, keeps backend tool access separate from frontend rendering, and supports rendering across React, Flutter, or Angular through a predefined component catalog. The broader combination also reserves MCP Apps for highly tailored experiences and describes A2UI in MCP Apps, where an embedded app can process A2UI responses and route user actions through an AppBridge; the conclusion recommends choosing among patterns according to project constraints.