FetchSandbox for Windsurf

io.github.fetchsandbox/mcp

A deterministic verification engine for agents. Proves a fix: fails on the old code, passes on new.

client:Windsurf transport:streamable-http runtime:npm tools:17

Install FetchSandbox in Windsurf

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

{
  "mcpServers": {
    "mcp": {
      "serverUrl": "https://fetchsandbox.com/mcp/v1"
    }
  }
}

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