I can't get Bright Data to crawl all my target sites

If Bright Data isn’t crawling all your target sites, the cause is usually one of a few things: target-side blocks, crawler config issues, rate limits, or site-specific rendering/login requirements.

Here’s a practical checklist to narrow it down:

1) Confirm the failure mode

• Are the requests:
  • Blocked with 403/429/captcha?
  • Timing out?
  • Returning empty or incomplete pages?
  • Failing only on some domains?
• Check Bright Data logs and the exact response codes.

2) Verify you’re using the right tool

Bright Data has different products depending on the task:

• Web Unlocker: good for accessing pages behind anti-bot measures.
• Scraping Browser: best for JS-heavy sites, logins, and dynamic rendering.
• Proxy Network: more control, but more setup and more likely to hit blocks if you don’t handle headers/fingerprints well.

If some sites are JS-rendered or require interaction, a plain HTTP fetch may not be enough.

3) Check site-specific requirements

Some sites need:

• A logged-in session
• Cookies / consent flows
• Specific headers
• Geo-targeting
• Mobile/desktop user agents
• JavaScript execution
• Pagination or API calls instead of page HTML

4) Reduce block signals

Common reasons crawlers get blocked:

• Too many requests too fast
• Repeated identical fingerprints
• Missing browser headers
• Bad session reuse
• Following a pattern that triggers bot detection

Try:

• Slower concurrency
• Rotating sessions
• Full browser mode
• Realistic headers and cookies
• Retrying with backoff

5) Test one site at a time

Pick one failing domain and isolate:

• Single URL
• Single proxy/session
• Single region
• Minimal automation steps

This helps determine whether the issue is Bright Data-specific or site-specific.

6) Inspect robots / legal constraints

Some sites actively block crawlers or restrict automated access. Make sure your collection method aligns with:

• The site’s terms
• Applicable laws
• Your intended use

7) If you want, I can help debug it

Send me:

• Which Bright Data product you’re using
• One example target URL
• The exact error/status code
• Whether the page needs login or JS
• A sample request config or code snippet

And I can help you diagnose why those specific sites aren’t being crawled.