marginal for Windsurf

sh.marginal/mcp

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

client:Windsurf transport:streamable-http

Install marginal in Windsurf

~/.codeium/windsurf/mcp_config.json · windows: %USERPROFILE%\.codeium\windsurf\mcp_config.json

{
  "mcpServers": {
    "mcp": {
      "serverUrl": "https://marginal.sh/mcp"
    }
  }
}

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs