Glossary

What is a Proxy Server?

A proxy server is an intermediary that forwards requests between a client and the internet. In web scraping, proxies mask your IP address, rotate identities across requests, and help bypass geo-restrictions and anti-bot protections.

How it works

How proxy servers work

When you browse the web normally, your computer sends requests directly to websites using your IP address. A proxy server sits between you and the target — your request goes to the proxy first, which then forwards it to the target website using its own IP address.

The target website sees the proxy's IP, not yours. The proxy receives the response and forwards it back to you. This simple indirection enables IP masking, geo-targeting, load distribution, and request anonymization — all critical for web scraping at scale.

In scraping, proxies solve a fundamental problem: if you send 10,000 requests from a single IP, the target site will block you. With a pool of proxies, those requests are spread across hundreds or thousands of IP addresses, making them look like normal traffic from different users.

Types

Types of proxy servers

Datacenter proxies

IPs from cloud providers and data centers. Fast (1-10ms latency), cheap ($0.50-2/GB), but easy to detect because the IPs are registered to hosting companies, not ISPs. Best for high-volume, low-risk scraping.

Residential proxies

IPs assigned by real ISPs to real homes. Much harder to detect and block because they look like normal users. More expensive ($5-15/GB) and slower, but essential for scraping sites with aggressive anti-bot protection.

Rotating proxies

Automatically assign a different IP for each request or on a timed interval. Available in both datacenter and residential variants. The gold standard for web scraping — each request appears to come from a unique user.

Mobile proxies

IPs from mobile carriers (4G/5G). The hardest to detect because mobile carriers use CGNAT, meaning many real users share the same IP. Most expensive but nearly impossible to block without collateral damage.

In scraping

Proxies in web scraping

IP rotation

Distribute requests across hundreds of IPs to avoid per-IP rate limits and blocks. Essential for scraping more than a few hundred pages from a single domain.

Geo-targeting

Access location-specific content by routing requests through proxies in specific countries. Useful for scraping localized pricing, search results, or region-locked content.

Cloudflare bypass

Residential proxies combined with headless browsers can bypass Cloudflare and similar anti-bot services. The proxy provides a clean IP, the browser passes JavaScript challenges.

Session persistence

Some scraping tasks (login flows, multi-page navigation) require the same IP across requests. Sticky sessions keep the same proxy IP for a defined period.

Frequently asked questions

A proxy server is an intermediary that sits between your computer and the internet. When you make a request through a proxy, it forwards your request to the target server using its own IP address, then relays the response back to you. This masks your real IP address.

Datacenter proxies use IP addresses from data centers — they're fast and cheap but easier for websites to detect and block. Residential proxies use IP addresses assigned to real homes by ISPs — they're harder to detect but more expensive and slower.

Rotating proxies automatically assign a different IP address for each request (or at a set interval). This makes it much harder for websites to detect scraping activity, since each request appears to come from a different user.

For small-scale scraping of sites without anti-bot protection, you may not need a proxy. For large-scale scraping, scraping behind Cloudflare, or scraping sites that rate-limit by IP, proxies are essential to avoid blocks. Alternatively, a managed API like SnapRender handles proxy rotation for you.

Using a proxy server is legal in most jurisdictions. Proxies are standard tools used by businesses for security, privacy, and network management. However, using proxies to circumvent access controls, commit fraud, or violate terms of service can create legal issues.

SnapRender manages a pool of rotating residential and datacenter proxies internally. When you make an API request, SnapRender automatically selects the best proxy for the target site, handles rotation, retries failed requests on different IPs, and manages the entire proxy infrastructure for you.

Skip the proxy headaches.

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