My surprise AI bill is why I built TokenBar

A few months ago I had one of those dumb founder moments where you stare at a bill and think: wait, how did it get that high? Nothing was obviously broken. No outage, no exploit, no wild traffic spike. I was just using LLMs all day while building, testing prompts, comparing models, and bouncing between apps. The problem was simpler: I had no feel for token burn while I was working. I could check dashboards after the fact, but that is like checking your speedometer after the road trip is over. Us