NativeExpress for ChatGPT

express.native.www/nativeexpress

Scope a mobile app to a first version, start from a free Expo template, and pass store review.

client:ChatGPT transport:streamable-http tools:5

Install NativeExpress in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://www.native.express/mcp

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