Mail Security Tools for ChatGPT
com.mailsecuritytools.api/email-security
Free DMARC, SPF, DKIM and MX checks, a 1-cent email security score and a $1 DNS fix plan.
client:ChatGPT
transport:streamable-http
tools:5
Install Mail Security Tools in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://api.mailsecuritytools.com/mcp
Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs