OpenAI opens MCP Extensions to build plugins that feel like native ChatGPT features
haltakov · x · 2026-09-30
OpenAI announced plugin extensions (openai/mcp-extensions), giving developers the same MCP/MCP Apps platform it uses internally for ChatGPT's meetings, health, and finance features. Capabilities include sidebar entrypoints, file-extension handlers, composer mentions, and extended forms—enabling first-class native-feeling plugins.
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