SDK that stops runaway AI API bills

A prompt loop runs overnight, and they wake up to a $500-$800 bill from OpenAI or Anthropic. The weird part? Everyone had dashboards. Everyone had monitoring. But nothing actually STOPPED the spend. Caplyr — a wrapper that sits in the API call path and enforces cost constraints in real time. How it works: - You wrap your AI client with protect() - Set a budget - Caplyr blocks requests at budget, auto-downgrades models when costs spike, and has a kill switch for emergencies It's two lines of code, no infra changes. npm install caplyr https://caplyr.com submitted by /u/Dojonx [link] [comments]