How to Scrape Without Getting Blocked: 12 Rules for 2026
By Elena Park · 2026-05-21 · 9 min read · Engineering
Twelve rules that separate professional scrapers from the script-kiddies who get blocked in hour one.
Rules 1–4: IP hygiene
1. Match IP type to target (residential for protected, datacenter for open). 2. Rotate aggressively. 3. Evict failed IPs immediately. 4. Use geo-matched IPs for localized sites.
Rules 5–8: Browser fingerprint
5. Use stealth-patched headless browsers. 6. Match TLS/JA3 of a real Chrome. 7. Randomize viewport, user-agent, time zone. 8. Don't leak via WebRTC.
Rules 9–12: Behavior
9. Throttle requests. 10. Randomize timing. 11. Respect robots.txt where applicable. 12. Use sticky sessions for multi-step flows.
Bonus: monitor & adapt
Anti-bot stacks evolve weekly. Maintain a dashboard for success rate per target — investigate any drop >5%.
When to give up DIY
If you're spending more than 20% of engineering time on anti-bot maintenance, switch to a managed Web Unlocker.
FAQ
Is web scraping illegal?
Public-data scraping is legal in the US and EU (hiQ v. LinkedIn). Bypassing logins or scraping personal data triggers separate legal regimes.