PafCore

What is PafCore?

PafCore is a website speed checker that goes beyond a simple score. Paste a URL and it tells you what is slowing the page down, which file is causing it, and what to try first. It uses Lighthouse-style lab testing, runs multiple measurements, and helps separate real improvements from random score changes. You can use it on the web, from the terminal, in Cursor or Claude through MCP, or through an API. The free check gives you the score, the slow file, and the first fix to try. Paid credits unlock deeper help like file-level findings, smaller image downloads, lab checks, and paste-ready code. Pro Watch adds scheduled checks, history, alerts, and monthly credits.

Key features

• Finds the slow file behind a bad performance score.
• Runs three browser checks to reduce noisy results.
• Shows what to fix first and estimated impact.
• Lets you recheck after changes to prove improvement.
• Works through website, CLI, MCP, and API.
• Can email reports or keep a shareable link.