Building a Domain Audit Engine using Cloudflare Workers and D1 (for $0/mo)

stackanchor.net Hello world! 🚀 After years in the corporate trenches, I decided to see how far I could push the Cloudflare free tier. I ended up building a sub-second domain audit engine for exactly $0.00/mo. I'm excited to join the community and share the workflow that made it possible. The "Vibe Coding" Story of StackAnchor. Let’s be honest: the traditional way of building apps—drawing diagrams for weeks, arguing over database schemas, and waiting for CI/CD pipelines that take 20 minutes—is dead. Last week, I decided to build StackAnchor . I didn't start with a sprint plan. I started with a vibe . I wanted a tool that could audit a domain’s health (SSL, Security Headers, Email Auth, SEO) in under 10 seconds, email a beautiful report, and cost exactly $0.00 to run at scale. Here is how I built it using Cloudflare’s "Infinity" stack, Antigravity (my AI pair programmer), and pure vibe coding. The Stack: Why Cloudflare? I chose Cloudflare because their Free Tier is essentially a superpow