Quick answer: A static site behind Cloudflare can get AI without a backend and without storing an API key. Workers AI binds a model like Llama 3.3 70B to your worker through a two-line env.AI config binding. The free tier is 10,000 neurons a day. Measured for real, that is about 80 answers a day at ~124 neurons and ~15 seconds each.
This happened in a single day. In the morning, our PRD consulting landing page was an ordinary static site: text, images, a mailto button. By the afternoon, that same page had a box where a reader can paste their app idea and get back an eight-section PRD skeleton with the risks called out, in about fifteen seconds.
Here is what we did NOT add: a server. There is still no backend of our own, no VM, no container, and not a single API key anywhere in the code. The site itself is still plain static HTML.
One thing makes this possible: Cloudflare Workers AI. This post explains how it works, plus the thing posts like this usually skip: numbers measured from the real thing. Neurons per answer, latency, and the actual bill, pulled fresh right before writing.
Terms used, all in one place:
