FetchSandbox for Cursor

io.github.fetchsandbox/mcp

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

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

Install FetchSandbox in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

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

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs