🕷️ CALFSYSBot — Crawler Information

This page describes the CALFSYSBot web crawler, used by the CalfSystem desktop SEO audit tool.

What is CALFSYSBot?

CALFSYSBot is a transparent web crawler used exclusively for user-authorized website technical SEO audits. It is NOT a search engine scraper or automated SERP collector.

It accesses websites to:

Check robots.txt directives
Analyze page structure (title, meta, headings, canonical)
Detect broken links and redirect chains
Audit Core Web Vitals and page performance
Render JavaScript-heavy pages for audit purposes

User-Agent

CALFSYSBot/2.5 (+https://seotoolsdownload.net/bot; contact=bot@seotoolsdownload.net)

Compliance

✅ Respects robots.txt by default
✅ Honors Retry-After headers
✅ Respects noindex / nofollow directives
✅ Rate-limited (max 5 concurrent requests per host)
✅ Same-domain only (external links analyzed, not crawled)
✅ Stops on CAPTCHA, 403, 429, or access challenges

What CALFSYSBot Does NOT Do

❌ Automatically query search engine result pages (SERP)
❌ Bypass CAPTCHAs or access controls
❌ Use stealth/anti-detection techniques
❌ Rotate proxies to evade blocks
❌ Store complete HTML or page screenshots by default

Contact & Opt-Out

If you believe CALFSYSBot has accessed a website without authorization, or you wish to opt out:

📧 Email: bot@seotoolsdownload.net

We will investigate and respond within 48 hours.

Last updated: 2026-05-29 · CalfSystem Studio

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