How to track OpenAI API costs with a simple proxy

The problem You're building with the OpenAI API and suddenly get a $200 bill. Which feature caused it? Which user? Which prompt? You have no idea. This happens to almost every developer building with LLMs. The solution I built LLMWatch – a lightweight proxy that sits between your app and OpenAI. It logs every request with exact cost, latency, and token usage. How it works Change one line in your code: // Before const openai = new OpenAI({ baseURL: "https://api.op...