Why am I getting captchas on high-volume scraping?

You’re getting CAPTCHAs because the site thinks your traffic looks automated or abusive. On high-volume scraping, common triggers include:

• Request rate spikes: too many requests per minute from one IP or IP range.
• Regular patterns: perfectly timed requests, predictable URLs, or sequential crawling.
• Shared/datacenter IPs: traffic from cloud providers or known proxy networks is often scored as higher risk.
• Lack of normal browser signals: missing or inconsistent headers, cookies, JS execution, or fingerprint data.
• Session anomalies: new sessions too often, no persistence, or rotating identities too aggressively.
• Behavior mismatches: fetching pages too fast, ignoring assets, or not behaving like a real user.
• WAF/bot protection rules: Cloudflare, Akamai, PerimeterX, DataDome, etc. may challenge based on reputation and behavior.
• Accessing sensitive pages: login, search, checkout, or endpoints with anti-abuse protection.

What you can do legitimately:

• Reduce request rate and add backoff on errors.
• Cache results and avoid re-fetching unchanged pages.
• Respect robots.txt and site terms where applicable.
• Use official APIs or data feeds if available.
• Make your crawler more “polite”: fewer concurrent requests, randomized delays, and stable sessions.
• Identify yourself if the site allows it, and ask for whitelisting or bulk access.
• Monitor server responses and stop when challenges increase.

If you want, I can help you diagnose the likely trigger from your request patterns or suggest a polite scraping architecture that reduces CAPTCHAs without trying to bypass protections.