null for ChatGPT

space.unhandled/null

Send any text and it is discarded on arrival. Nothing kept but a count.

client:ChatGPT transport:streamable-http tools:1

Install null in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://null.unhandled.space/mcp

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