Working code for fetching, rotating and checking proxies.
Use the Proxy11 Python SDK with requests to rotate public proxies, recover from dead ones, and keep your API key out of source code.
Route a Node.js HTTPS request through a Proxy11 proxy using HttpsProxyAgent, with timeouts and handling for dead proxies.
Fetch proxies for a scraper with the Proxy11 API, test them against your real target, and plan for how often free proxies fail.
Pick a proxy with one Proxy11 API request, using random selection or a sticky session with a configurable time window.
Many free proxy lists include Cloudflare servers that only look like proxies. How they pass simple tests, and how to find them in your own list.
What 407, 502, 503, connection refused, timeouts and SSL errors mean when you use a proxy, with real curl and Python output and the fix for each.
We ran our own proxies and logged what the owner sees over HTTP and HTTPS, including fake passwords, cookies and changed pages. What is safe to send and what isn't.