TurnSignal

Overview

TurnSignal is a Model Context Protocol server that gives AI agents read-only access to Playwright CI results. It surfaces new vs known failures, identifies flaky tests, and provides test history — all in a form agents can query and act on through standard MCP tools.

The server runs locally via npx -y turnsignal and communicates over stdio. You'll need to provide a TURNSIGNAL_TOKEN via environment variable for API authentication. The latest release is v0.6.3.

TurnSignal lives in the Web Scraping category on mcp.site and works with MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain TurnSignal at turnsignal.ai, you can claim this listing to verify ownership and keep the information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "turnsignal": {
      "command": "npx",
      "args": [
        "-y",
        "turnsignal"
      ],
      "env": {
        "TURNSIGNAL_TOKEN": "<turnsignal-token>"
      }
    }
  }
}

Requires TURNSIGNAL_TOKEN