Mailshake cold email sales outreach MCP server: list campaigns, add recipients to a campaign.
Streamable HTTP
https://cotlet.dev/mcp/v1/mailshake/connectclaude mcp add --transport http mailshake https://cotlet.dev/mcp/v1/mailshake/connectStreamable HTTP
https://cotlet.dev/mcp/v1/mailshakeclaude mcp add --transport http mailshake https://cotlet.dev/mcp/v1/mailshakeThis server publishes no installable package.