Most developers discover their AI API bill too late. You see "$0.15 per million tokens" and think "cheap," but by the time your monthly bill arrives, it's $250 instead of $25. Why? Because every API request includes conversation history. Your 10th request costs 20x more than your first. The per-token price is misleading. **Full disclosure:** I'm the maker. I built this after seeing too many teams get surprised by their AI API bills. Try it → https://www.rolltok.com