HTML Email Playbook for ChatGPT

io.github.osamahassouna/email-playbook-mcp

Teaches AI to write HTML email that renders in Outlook, Gmail, and Apple Mail. 19 rules, 6 comps.

client:ChatGPT transport:streamable-http runtime:npm tools:4

Install HTML Email Playbook in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://docs.osamahassouna.com/api/mcp

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