Skybridge: An open-source React framework for building MCP apps in AI assistants
By
Paul Leseute
Summary
Skybridge is an open-source React framework for building MCP (Model Context Protocol) apps that run inside AI assistants like ChatGPT and Claude. Created by Fred, co-founder and CTO of Alpic, the framework fills the gap left by OpenAI's minimal Apps SDK by providing a full-stack solution including MCP server, view rendering, client compatibility, testing tunnel, and hot module reload. It addresses the lack of modern developer tooling for AI apps, enabling developers to code once and ship everywhere. The project has achieved over 500K downloads and dozens of apps in stores.
Source
Key quotes
· 3 pulledWhen ChatGPT Apps launched in October 2025, the OpenAI Apps SDK was just a page of documentation. No runtime, no tooling, nothing. So we built the missing SDK ourselves.
Hot Module Reload, instant iteration, host context mocking... things web developers have taken for granted for a decade... simply didn't exist for AI Apps.
Code once, ship everywhere. Already +500K downloads and dozens of apps in the stores!
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