Bottled for ChatGPT

email.bottled/bottled

Branded email on your own domain: send, reply, search, aliases, contacts and campaigns.

client:ChatGPT transport:streamable-http

Install Bottled in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://bottled.email/api/mcp/mcp

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