day3 MCP Server: Install & Setup

Install day3 in Claude Code

Claude Code

claude mcp add --transport http day3 https://go.day3.app/api/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "day3": {
      "url": "https://go.day3.app/api/mcp"
    }
  }
}

Frequently asked questions

What does the day3 MCP server do?

Draft email campaigns in day3 from Claude Code, Cursor or VS Code as editable composer blocks.

Is the day3 MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does day3 run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add day3 to Claude Code?

Run: claude mcp add --transport http day3 https://go.day3.app/api/mcp

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