NestDaddy

day3

io.github.Mopra/day3 ยท v1.0.0

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

Connect Remote server

Terminal
claude mcp add --transport http day3 https://go.day3.app/api/mcp --header "Authorization: Bearer <YOUR_API_KEY>"
~/.cursor/mcp.json
{
  "mcpServers": {
    "day3": {
      "url": "https://go.day3.app/api/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "day3": {
      "type": "http",
      "url": "https://go.day3.app/api/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://go.day3.app/api/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server asks for a key before it lists its tools. Connect it with your own key to see them.

Headers

NameDescription
Authorization
Required, secret
Bearer token: 'Bearer day3_live_...', an API key created in the day3 app

Details

Endpointhttps://go.day3.app/api/mcp (Streamable HTTP)
First published11 Oct 2026
Last updated11 Oct 2026
Registry nameio.github.Mopra/day3

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