HTTP 429 After Proxy Rotation: IP Pool or Request Pacing?
Diagnose HTTP 429 after proxy rotation by separating request pacing, identity carryover, sticky sessions, and proxy-pool fit before changing providers.
Rotating Residential Proxies for Web Scraping in 2026 An Engineering Guide to Choosing Validating and Operating at Scale
Rotating residential proxies can look stable in trials and fail at scale. Four verification gates, two reproducible labs, and an evidence bundle to measure drift, 429 pressure, and cost per success.
