Website Tech Detector API — Complete Guide

Last year, I was working on a competitor analysis tool and found myself constantly trying to figure out what tech stack other websites were using. After building and rebuilding fragile scrapers that broke every other week, I decided to turn my frustration into a product. Here's how I built a production-ready Website Tech Detector API that now serves thousands of requests daily. The Problem with DIY Scrapers If you've ever tried to detect website technologies programmatically, you know the pain. I started with simple approaches like: // My naive first attempt const detectWordPress = ( html ) => { return html . includes ( ' wp-content ' ) || html . includes ( ' wordpress ' ); }; This worked... until it didn't. Websites use CDNs, minify assets, implement CSP headers, and actively block scrapers. My scripts would work locally but fail in production. Rate limiting kicked in. Cloudflare started returning 403s. I was spending more time maintaining scrapers than building features. The breaking