Field notes on bot walls, TLS fingerprinting, and the slow war between scraper devs and anti-bot vendors.https://recurl.neullabs.com/en-ushttps://recurl.neullabs.com/blog/why-curl-fails-on-cloudflare-2026/https://recurl.neullabs.com/blog/why-curl-fails-on-cloudflare-2026/A curl request and a browser request used to look the same on the wire. They do not anymore. Here is what actually changed, why your scripts started returning 403s, and what the response means.Fri, 22 May 2026 00:00:00 GMThttps://recurl.neullabs.com/blog/tls-fingerprint-mimicry-cat-and-mouse/https://recurl.neullabs.com/blog/tls-fingerprint-mimicry-cat-and-mouse/Why your spoofed User-Agent does not matter, how JA3 and JA4 actually work, and what curl-impersonate does under the hood. A field guide to the slowest-moving arms race in scraping.Fri, 15 May 2026 00:00:00 GMThttps://recurl.neullabs.com/blog/recurl-vs-headless-browser/https://recurl.neullabs.com/blog/recurl-vs-headless-browser/Headless browsers solve every scraping problem and cost ten times what they need to. Here is the decision framework we use to pick between recurl and a Playwright/Puppeteer pipeline.Fri, 08 May 2026 00:00:00 GMT