A startup co-founder emailed me. I couldn't tell if it was real — so we built th

<p>Day 5 of my 21-day API challenge is done.</p> <p>Yesterday I built a Text Readability Scorer. Today I built an <strong>Email Validator &amp; Disposable Email Checker

<p>Most Playwright suites stop right before the hard part of a signup flow: the "confirm your email" link, the emailed 6-digit code, the password-reset mail. The usual reasons are

<blockquote> <p><em>A tool should do one thing, do it well, and — this is the part everyone forgets — know exactly where its knowledge ends.</em></p> </blockquote> <p>I built

<p>In January and February 2026, security researchers filed <a href="https://www.heyuan110.com/posts/ai/2026-03-10-mcp-security-2026/" rel="noopener noreferrer">30 CVEs against

<p><em>8 dimensions. 38 checks. 5 seconds. 0% industry pass rate.</em></p> <h2> The Problem </h2> <p>DAST exists for web apps. DAST exists for APIs. DAST does not exist for AI