By skyforbes 
How I built a profitable micro-app from my daily AI experiments — using nothing but FastAPI and Stripe
In February 2025, I noticed something strange.
Every day, I was writing new ChatGPT prompts — long, polished, and powerful — to automate parts of my work.
Some turned emails into blogs. Others summarized research papers.
They saved me hours… but they were trapped in my chat history.
So I built a 52-line app that turned those prompts into shareable, monetizable APIs.
Today, that side project runs quietly in the background — earning me subscription income while I sleep.
Here’s exactly how it worked.
The Problem It Solved
AI prompts are the new scripts.
They hold logic, personality, and workflow.
But unlike code, they’re not reusable or shareable in a clean way.
I wanted a simple app where I could plug in any GPT prompt and instantly turn it into a public API endpoint — something others could call for their own automation.