Sidemail MCP is an official Model Context Protocol (MCP) server that exposes Sidemail's email platform capabilities to large language models and AI agents. It enables programmatic access to transactional email sending, marketing/newsletter creation, contact management, and sending domain configuration through simple model commands. By bridging LLM outputs with Sidemail's delivery infrastructure and API, the MCP server allows AI tools to compose, schedule, and dispatch emails while leveraging Sidemail's deliverability and domain controls. The project is published on GitHub and is designed to be integrated into AI-driven workflows that require reliable, automated email delivery.