Cheap AI tokens need request-level receipts

A cheap AI token model's price is only half the story, as the actual cost depends on the request path. To build trust, a receipt is needed that preserves details such as the API key, model, route, and latency. Without this detail, cheap token access can feel like a black box, making it harder to budget and track AI spend. To fix this, a token gateway should provide a clear accounting surface that shows the breakdown of costs for each request.