Topic developers
curl: (5) Could Not Resolve Proxy, and curl (97) Proxy Handshake Error: Causes and Fixes
curl exit 5 means the proxy's hostname did not resolve, usually a leftover variable or a typo. Exit 97 is a failed proxy handshake, usually SOCKS. The fixes for both.
Docker Behind a Proxy: proxyconnect tcp, TLS Handshake Timeout, and x509 Errors Fixed
Docker has three proxy settings: the daemon's, the client's for containers, and Docker Desktop's. Which one each error points at, and the certificate fix.
Git Proxy Settings: How to Set, Unset, and Fix Every Proxy Error
How git finds its proxy, how to set and remove it, and the fix for each error: could not resolve proxy, 407 after CONNECT, and the SSL certificate problem.
net::ERR_PROXY_CONNECTION_FAILED in Puppeteer, Playwright, and Selenium: Causes and Fixes
Headless Chromium reports proxy failures as net:: errors on page.goto. What each means, why 127.0.0.1 fails inside Docker, and how each framework passes credentials.
npm Proxy Settings: Fix ECONNRESET, ETIMEDOUT, 407, and "You Are Behind a Proxy" Errors
npm's network errors all end with the same proxy hint. How npm finds its proxy, the .npmrc keys, the certificate fix for corporate proxies, and what each error means.
pip Behind a Proxy: Fix "Cannot Connect to Proxy", 407, and Certificate Errors
How pip finds its proxy, the --proxy flag and pip.conf keys, and the fix for each error: cannot connect to proxy, 407 in the tunnel, and certificate verify failed.
Proxies and AI Coding Tools: The Model Connection, the Code You Build, and Which One Needs a Proxy
Every AI coding tool, Claude Code, Cursor, Copilot, Cline and the rest, raises the same proxy question, and the answer is always two answers. The tool's own connection to its model rarely needs a proxy, and never to hide you. The code and agents you build with it often do. This explainer draws the line once, so the per-tool guides can skip it.
Proxies for Claude Code: The Scrapers You Build, the Corporate Proxy It Documents, and What an IP Never Does
Proxies for Claude Code split into three questions. The big one is the code it writes for you, scrapers, crawlers, monitors and browser agents, which needs residential proxies to run at scale. The second is routing Claude Code itself through a proxy, which it documents with HTTP(S)_PROXY (no SOCKS) for corporate networks and reachability. The third is everything a proxy never does.
Proxies for Cline: The Browser Tool It Runs and the Automation It Builds
Cline is unusual among AI coding agents: it has a built-in browser tool, so it browses the web itself, and it builds automation that does the same. Both meet the walls a proxy solves. This covers where the proxy goes for the code Cline writes, the reachability angle of its bring-your-own-key model access, and the honest limits.
Proxies for Cursor: Its Agents Build Scrapers, and That Is Where a Proxy Belongs
Cursor is an agent-first IDE, and its agents write and run the scrapers, crawlers and automation that need proxies. This covers the residential-proxy layer for what Cursor builds, Cursor's own VS Code proxy settings for corporate networks, and what an IP never does for the editor itself.
Proxies for GitHub Copilot: The Corporate Proxy It Documents, and the Agents That Actually Need One
GitHub Copilot's proxy story is mostly the corporate one: it documents proxy settings per IDE, basic and Kerberos authentication, and custom certificates for TLS-inspecting networks. That is your company's proxy, not a residential one you buy. The residential proxy belongs to the scrapers and agents you build with Copilot, and this covers both.
Proxies for MCP Servers: The Fetch-Heavy Ones Need Residential IPs, and Where the Proxy Goes
An MCP server that fetches the web, a scraper, a search tool, a price checker, hits the same bot walls and per-IP limits as any client, so it needs residential proxies. One that talks only to a private API does not. This covers which MCP servers need a proxy, where it goes in the server, and how to wire it in the common runtimes.
Proxies With the Claude Agent SDK: Proxying the Agents You Build, Not the Model
The Claude Agent SDK is Claude Code as a library, so the agents you build with it browse the web through built-in and custom tools. This guide shows where a proxy goes: in the custom tools and subprocess code that fetch sites, and the process-level HTTP(S)_PROXY for reachability, with the honest note that the SDK's own model calls do not want one.
Free Proxies for Scrapy: What Actually Works
Free proxies for Scrapy are fine for testing your middleware, not a real crawl. The rotating-middleware config, why dead exits thrash a run, and how to verify.
Free Proxies for Selenium: What Actually Works
Free proxies for Selenium work for a throwaway session, not an unattended run. How to set the Chrome proxy arg and Selenium Wire, and why free exits hang.
Roblox API Proxy: Fix the HttpService 403 and Read the Real Rate Limits
HttpService refuses the roblox.com web API, so swapping the host clears the 403 in one edit. The per-endpoint rate limits, measured again on 16 September 2026, decide whether the project needs one address or fifty.
Free Proxies for Web Scraping: Do They Work, and the Safe Alternatives
Do free proxies for web scraping actually work? Where the limits are, the safest free options, how to test them, and when to upgrade to reliable proxies.
Proxies for Scrapy: The Right Type, Setup, and Avoiding Bans
Proxies for Scrapy explained: which proxy type fits your target, real settings.py and middleware setup, sticky vs rotating, and how to stop bans and 429s.
How to Fix cURL Proxy Errors (7, 56, and 60)
Three cURL exit codes cover almost every proxy failure: 7, 56 and 60. What each one means, why proxies trigger it, the real fix, and the failure that exits 0.
How to Use Proxies With cURL: Flags, Gotchas and Copy-Paste Recipes
Every way to route curl through a proxy: -x syntax, SOCKS5 against socks5h, proxy auth, environment rules, and what a stub proxy recorded for each of them.
Proxies for Web Scraping: The Complete, No-Nonsense Guide
How to choose and use proxies for web scraping: proxy types ranked by job, rotation strategy, avoiding blocks, request hygiene, and code you can run today.
Proxies that don't die mid-job
Residential, ISP, datacenter and mobile, verified by the same engine that runs tens of millions of checks. They read as a real device and hold up under load. Pay as you go, and your balance never expires. $0.44/GB is the 2,000 GB+ rate; a single gigabyte is $0.50/GB, with no minimum order.
129M+ proxy checks run · 100+ countries · HTTP / HTTPS / SOCKS · re-checked every few minutes · no signup