BuiltOnRails for ChatGPT

io.github.nauman/builtonrails

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client:ChatGPT transport:sse

Install BuiltOnRails in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://builtonrails.com/mcp/sse

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs