Couryo free email tools for ChatGPT

com.couryo/tools

Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.

client:ChatGPT transport:streamable-http tools:6

Install Couryo free email tools in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.couryo.com/tools

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