Hts for ChatGPT
io.github.pipeworx-io/hts
HTS MCP — US import tariff rates via the USITC Harmonized Tariff Schedule.
client:ChatGPT
transport:streamable-http
Install Hts in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://gateway.pipeworx.io/hts/mcp
Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs