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A mole in a yellow hard hat turns a brass key in a big brass padlock hanging from a red-and-white striped barrier across a cobbled honey-stone lane, beside a red-brick gatehouse with a 407 sign, wisteria and a lantern, with an open wooden toolbox of spanners and a hammer at its feet.

Error Resolution

Error 407 Proxy Authentication Required: Causes and Fixes

Error 407 means the proxy wanted credentials it didn't get. Fix it in curl, Python, Node, npm, pip, git and browsers, including passwords with symbols.

October 31, 2026 · 21 min read

Proxy Fundamentals

Rotating Proxies: How Residential IP Rotation Works

Oct 26, 2026 · 10 min read

A small round robot holds up a brass stopwatch, timing a row of wooden carts, each carrying an orange ball, as they roll side by side on parallel rails out of the open doors of a whitewashed datacenter full of server racks, in a sunny stone-flagged yard.

Proxy Fundamentals

Benchmarking Datacenter Proxies Under Concurrency

Oct 24, 2026 · 25 min read

Setup Guides

How to Find Your Proxy Server Address on Any Device

Oct 23, 2026 · 9 min read

Security Concepts

IP Abuse: How to Check, Report and Fix a Flagged IP

Oct 19, 2026 · 10 min read

A mole in a yellow hard hat peers through a large magnifying glass at a big smartphone on a wooden stand, its screen showing a map with a red location pin, beside a red-and-white cell tower whose base carries a cream plate lettered ASN, in a sunny field corner by a dry-stone wall.

Proxy Fundamentals

How to Verify a Mobile Proxy's Carrier, ASN, and Location

Oct 17, 2026 · 21 min read

Error Resolution

Cannot Establish Proxy Connection? How to Fix It

Oct 16, 2026 · 10 min read

Scraping Techniques

Multi-Region Crawling: Geo-Targeted Collection and Where the Data Lives

Oct 14, 2026 · 7 min read

A small round robot in a sunny red-brick yard pushes a glass canister of crumpled pages back into a brass pneumatic-tube terminal under a large API plate, beside a RETRY signboard, while a brass pipeline feeds a conveyor belt carrying finished pages into a wire basket.

Scraping Techniques

Scraper API Retry Handling for Production Pipelines

Oct 13, 2026 · 20 min read

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Use Cases

Cross-Country Ecommerce Price Monitoring: How to Get and Prove Local Prices

Oct 7, 2026 · 20 min read

Scraping Techniques

The Crawl Frontier: Redis, SQS and Kafka for URL Queues

Oct 7, 2026 · 8 min read

A cartoon spider on sunlit courtyard flagstones points one leg at a wall hatch with blue shutters under an API sign, where a paper page lies on the counter, and the other at a wooden browser-window frame worked by teal cords and brass levers under a BROWSER sign.

Scraping Techniques

Scraper API vs. Scraping Browser: When to Use Each One

Sep 28, 2026 · 23 min read

Designing Crawler Egress: NAT Gateways, Proxy Pools and Per-Worker IPs

Sep 25, 2026 · 7 min read

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