Plain Freight for ChatGPT

com.plainfreight/quotes

All-in DDP quotes for China to USA shipments, 100 g to 2,000 kg, from a live rate card

client:ChatGPT transport:streamable-http tools:3

Install Plain Freight in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://plainfreight.com/api/mcp

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