I built a competitor pricing monitor as a side project that ran clean for about 6 weeks then one morning woke up to a completely empty report.

Spent days going through everything I could think of like proxy rotation, header spoofing, user agent randomization. Every fix worked for a few days then stopped, and the pattern was always the same

The reason everything kept failing is that modern Cloudflare protection fingerprint the entire request, the way JavaScript gets executed, the TLS handshake, the timing patterns.

Most scrapers fail because they don't render JS the way a real browser does, or their request behavior is too consistent, or the TLS stack looks too clean.…