marginal for VS Code

sh.marginal/mcp

Email A/B tests for AI agents: subject lines, managed sends, open/click tracking, and results.

client:VS Code transport:streamable-http

Install marginal in VS Code

.vscode/mcp.json

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://marginal.sh/mcp"
    }
  }
}

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