Mailcheer for ChatGPT
com.mailcheer/mailcheer
Manage a Mailcheer email workspace: subscribers, segments, campaigns, transactional sends and stats.
client:ChatGPT
transport:streamable-http
tools:13
Install Mailcheer in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://mailcheer.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