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What Happens When a Scraper Gets Blocked

Scrapers typically receive 403 and 429 errors when a server detects overly frequent requests, repetitive network patterns, or IP addresses with a poor reputation.

🔥 Common causes:

- Request frequency that is too high or too uniform
- Incorrect headers or User-Agent configuration
- Exceeding the target server’s rate limits
- Low-reputation or overloaded IP addresses

⚡️ What helps:

- Exponential backoff → increasing delays after errors
- Rotating residential proxies → distributing independent requests across IPs
- Mobile proxies → tasks with stricter network trust requirements
- Datacenter proxies → fast data collection from less protected resources

A resilient scraper should respect server limits, handle 403/429 responses correctly, and change its network route only when it genuinely fits the logic of the task.

The detailed video is already available on our channel