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port view size checking

Scraping Techniques

Screen, Viewport and devicePixelRatio: The Geometry That Does Not Add Up

A default headless browser reports a 1920x1080 screen, a 1920x1080 viewport, zero window chrome and a devicePixelRatio of exactly 1 — arithmetic no real laptop produces. This post walks every screen and viewport property, the relationships that have to hold between them, the CSS media-query surface that sits alongside, and how to configure a browser context whose numbers are internally consistent.

September 16, 2026 · 7 min read

Spider timezone and IP

Scraping Techniques

Timezone, Locale and Your Exit IP: The Cheapest Contradiction to Ship

Sep 15, 2026 · 7 min read

A Python snake operates a browser-shaped page press and a brass sieve that catches loose alarm clappers while one changed teal page passes through to ring a bell.

Coding Tutorials

Monitor website changes in Python without false alerts

Sep 14, 2026 · 41 min read

browser identity

Scraping Techniques

Sec-CH-UA, User-Agent and navigator: Three Places You Declare the Same Identity

Sep 11, 2026 · 7 min read

browser web driver puppet

Scraping Techniques

navigator.webdriver and the Traces a Driven Browser Leaves

Sep 8, 2026 · 7 min read

Cover page for HiQ Labs vs Linkedin

hiQ Labs v. LinkedIn: What the Case Actually Settled About Public Data

Sep 7, 2026 · 7 min read

pay per request

Proxy Fundamentals

Pay Per Crawl and the Licensed Web: When Access Becomes a Transaction

Aug 26, 2026 · 8 min read

A tracked crawler robot and a round AI agent hold a BOT ID certificate stamped VERIFIED, with a keyhole wax seal, before a browser-shaped key-directory cabinet.

Proxy Fundamentals

Web Bot Auth: Cryptographic Identity for Crawlers and AI Agents

Aug 24, 2026 · 8 min read

A cottage full of busy robots at separate desks, with every letter leaving through a single mailbox at the gate

Network Performance

Self-Hosted n8n: What Changes When Your Workflows Have One IP Address

Aug 21, 2026 · 9 min read

A cartoon tarantula climbing a wooden ladder whose three plank rungs are lettered FETCH, PROXY and RENDER, beside three rising stacks of gold coins

Scraping Techniques

n8n Web Scraping: Which Node, Which Mode, and What It Costs

Aug 21, 2026 · 10 min read

A cartoon spider holding a two-part pass, the USER stub bare and the PASS stub carrying the appended targeting tags

Setup Guides

Using Proxies in n8n: The HTTP Request Node, Sessions and Rotation

Aug 21, 2026 · 10 min read

A cartoon spider serving a small robot from a wooden service hatch with a short menu board, the key staying inside the stall

Setup Guides

Build a Scraping MCP Server in n8n With the MCP Server Trigger

Aug 21, 2026 · 11 min read

A puzzled cartoon spider at a crossroads signpost carrying four identical MCP arrows, three pointing one way and one pointing the other

Setup Guides

n8n and MCP: Four Different Things With the Same Name

Aug 21, 2026 · 9 min read

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