PlugRail Corporate Number for ChatGPT

dev.plugrail/jp-corporate

Japanese corporate number lookup using official National Tax Agency public data.

client:ChatGPT transport:streamable-http tools:6

Install PlugRail Corporate Number in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://jp-corporate.plugrail.dev/mcp

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