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MCP Apps
MCP-UI becomes MCP Apps, an official standard from Anthropic + OpenAI
MCP-UI, created by Ido Salomon and Liad Yosef, was standardized as 'MCP Apps' — an official MCP extension jointly adopted by Anthropic and OpenAI that unifies MCP-UI with what OpenAI called Operator Plugins. Agents can now render full interactive HTML UIs directly inside chat, avoiding iOS-vs-Android style fragmentation with one open standard.