NessGate for ChatGPT

com.nessgate/nessgate

Universal resolver for the agentic web: give a domain, get one normalized discovery answer.

client:ChatGPT transport:streamable-http tools:1

Install NessGate in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://nessgate.com/mcp

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