day3

Official MCP server for day3, an email platform for newsletters, product updates and transactional email, billed by emails sent rather than list size. Agents read account context (audiences, senders, plan), list and read campaigns, create and edit drafts that land as editable composer blocks, render previews and send tests to named addresses. Sending or scheduling to a whole audience needs an API key with the `campaigns:send` scope, and enrolling a contact in an automation needs `automations:enroll`; both are off by default. 11 tools. Hosted Streamable HTTP at `https://go.day3.app/api/mcp`; Bearer API key required, nothing to install. Docs: https://docs.day3.app/mcp.

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