MCP UI: Breaking the text wall with interactive components (2025) - Shopify

What this post added

Introduced MCP UI as an extension to the Universal Commerce Protocol (UCP) to enable AI agents to return interactive UI components. Detailed three delivery methods for MCP UI: inline HTML, remote resources, and Remote DOM. Explained the intent-based message system for component-agent communication, listing example intents like `view_details`, `checkout`, `notify`, and `ui-size-change`. Discussed adaptive styling capabilities using CSS to match host environments. Highlighted the open-source nature of the MCP UI specification and implementation, built on the MCP embedded resources spec.