TL;DR
A proxy in web scraping is an intermediary server that forwards your request so the target site sees the proxy's IP address instead of yours. Scrapers use proxies to spread traffic across many IPs, reach geo-restricted content, and avoid the per-IP rate limits and blocks that stop single-address scraping.
Why Scrapers Need Proxies
Websites track behavior per IP address. Send a few hundred requests from one IP and you cross a rate threshold, collect a 429, and eventually get blocked. A proxy pool spreads those requests across many addresses, so no single IP looks abnormal, and it lets you request content that varies by country by choosing an IP in the right location.
The Main Proxy Types
Datacenter proxies come from hosting providers. They are fast and cheap, but their IP ranges are published and easy for anti-scraping systems to flag.
Residential proxies route through real consumer ISP connections, so requests look like ordinary home users. They cost more and are slower, but clear far more defenses.
Mobile proxies use cellular IPs shared by many real users through carrier NAT, which makes them the hardest to block and the most expensive.
Using a Proxy in Code
Most HTTP clients accept a proxy per request. The credentials and host come from your provider:
import requests
proxies = {
"http": "http://user:pass@proxy.example.com:8000",
"https": "http://user:pass@proxy.example.com:8000",
}
response = requests.get("https://example.com", proxies=proxies, timeout=(5, 30))At scale, a single proxy is not enough; you rotate across a pool so each request or session uses a fresh address. See proxy rotation for how that works, and note that a failed proxy handshake surfaces as a 407 error, separate from any target-side block.
Key Takeaways
- A proxy hides your real IP behind an intermediary the target sees instead.
- Datacenter is fast and cheap, residential blends in, mobile is hardest to block.
- One proxy is never enough at scale; rotate across a healthy pool.
How ScrapeGraphAI Handles This
ScrapeGraphAI includes managed proxy infrastructure, so you never procure, authenticate, or rotate proxies yourself. Requests to the scrape endpoint are routed through appropriate residential IPs automatically based on the target and any geographic requirement.