MailStream for VS Code

app.mailstream/mailstream

The first MCP server for physical mail: send postcards and letters, manage lists and campaigns.

client:VS Code transport:streamable-http

Install MailStream in VS Code

.vscode/mcp.json

{
  "servers": {
    "mailstream": {
      "type": "http",
      "url": "https://my.mailstream.app/mcp"
    }
  }
}

Requires agent mode. MCP: Open User Configuration puts the same block in every workspace. VS Code docs