TestLens for Cursor

net.bigfloppy.testlens/testlens

Paste code + tests, get a strong/weak verdict with killed/survived mutants. Free API + MCP.

client:Cursor transport:streamable-http tools:2

Install TestLens in Cursor

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

{
  "mcpServers": {
    "testlens": {
      "url": "https://testlens.bigfloppy.net/mcp"
    }
  }
}

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