justloop

by alifmaheaven · Browser Automation · MCP server

justloop is an MCP server by alifmaheaven. The deterministic verification layer for the agentic coding era — browser-driven E2E tests, visual Playbook canvas, failure forensics, and native MCP tools. Its npm package was downloaded 46 times last week.

Category: Browser Automation
Author: alifmaheaven
GitHub stars: Not on GitHub
This week: Tracking since 18 Oct 2026
Weekly downloads: 46
Language: JavaScript
License: Apache-2.0 (open source)
Last update: 2026-10-10 (14 days ago)
Links: Source npm

testing
playwright
e2e
browser
verification
mcp
model-context-protocol
ai-agent
claude-code
cursor
windsurf
cline
+4 more

How to install justloop

justloop is published on npm as justloop, and it depends on @modelcontextprotocol/sdk. These steps assume it runs as a local stdio server, which is the usual setup.

Check the README. Confirm the start command and note any API keys or environment variables it needs (pass them with -e KEY=value or an env block). You need Node.js for npx.

Add it to Claude Code from a terminal:

claude mcp add justloop -- npx -y justloop

Or add it to Cursor or Claude Desktop in .cursor/mcp.json or claude_desktop_config.json:

{
  "mcpServers": {
    "justloop": {
      "command": "npx",
      "args": [
        "-y",
        "justloop"
      ]
    }
  }
}

Restart the client and check it. Run claude mcp list, or open the client's MCP settings, and confirm justloop and its tools are listed. The install guide covers VS Code and Codex.

Also listed in

Maintain this project? Get it featured ($99/mo, pinned at the top of Browser Automation) or see what featuring includes.

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Frequently asked questions

What is justloop?

justloop is an MCP server by alifmaheaven in the Browser Automation category. The deterministic verification layer for the agentic coding era — browser-driven E2E tests, visual Playbook canvas, failure forensics, and native MCP tools. Its npm package was downloaded 46 times last week. It is written in JavaScript. It is licensed under Apache-2.0. It was last updated 14 days ago.

Is justloop free and open source?

Yes. justloop is published under the Apache-2.0 license, so you can run, modify and self-host it at no cost. If it connects to a paid service, that service's own pricing and API terms still apply. Check the repository for the exact license text before using it commercially.

What are the alternatives to justloop?

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Data last updated 25 October 2026. Stars and downloads are refreshed every day from GitHub and npm.