Mailshake MCP Server and API by Cotlet for ChatGPT

dev.cotlet/mailshake

Mailshake cold email sales outreach MCP server: list campaigns, add recipients to a campaign.

client:ChatGPT transport:streamable-http

Install Mailshake MCP Server and API by Cotlet in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://cotlet.dev/mcp/v1/mailshake/connect

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