Unitpost for ChatGPT

com.unitpost/mcp

Send email with approval: hosted MCP for email, campaigns, contacts, domains.

client:ChatGPT transport:streamable-http

Install Unitpost in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.unitpost.com/mcp

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