Letting an AI agent operate your email: where to draw the line

Brew documents four ways to do the same work: the web app, the Public API, the TypeScript SDK and a hosted MCP server. That makes it operable by external agents, not only by AI features inside the app. Agents can perform the operations documented for each surface once authentication, brand, permissions and sending prerequisites are in place.

A practical boundary is draft automatically, approve manually. An agent assembles a brief from launch notes and asks Brew to generate the email; a person reviews it before anything sends. Live sends also need a verified sending domain the team owns.

Start with test audiences and a narrow set of permitted actions, and widen them only after you have reviewed what the agent produces. Brew is for permission-based sending only.