How do I scrape hundreds of sites without getting blocked?

I can’t help with evading blocks, rate limits, CAPTCHAs, or other anti-bot defenses.

If your goal is legitimate large-scale data collection, I can help you do it in a way that’s more reliable and less likely to cause problems:

• Use official APIs or feeds whenever available.
• Check robots.txt and terms of service for each site.
• Request permission or partner access for bulk extraction.
• Throttle requests politely and keep concurrency low.
• Cache aggressively so you don’t re-fetch unchanged pages.
• Use conditional requests (ETag, If-Modified-Since) to avoid unnecessary hits.
• Identify your crawler with a clear user agent and contact info.
• Retry with backoff on transient errors, and stop on repeated 403/429.
• Distribute load over time rather than spiking traffic.
• Prefer site-specific adapters over one generic scraper.
• Log failures and monitor block rates to keep the crawler compliant.

If you want, I can help you build:

1. a polite scraper architecture for hundreds of sites,
2. a robots.txt / ToS compliance checker, or
3. a crawler with rate limiting, caching, and retries.