Domain Mail Check for ChatGPT

app.openkrill/mailcheck

Check how a domain is set up for email and who it is registered with, from public DNS data.

client:ChatGPT transport:streamable-http tools:8

Install Domain Mail Check in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mailcheck.openkrill.app/mcp

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