SpendBar: Track AI API spend from your Mac menu bar

Hey Product Hunt 👋🏼 I built SpendBar because AI API bills are easy to ignore until they are not. If you are experimenting with agents, side projects, internal tools, or production AI features, your usage can creep up quietly across Anthropic and OpenAI. SpendBar puts that number in the Mac menu bar so you can catch it early. A few notes: * It tracks Anthropic and OpenAI API spend * It can show each provider separately or one combined “All AI” total * Keys stay in macOS Keychain * Spend data stays local * No account, no analytics, no backend * It is for usage-based API billing, not ChatGPT Plus or Claude Pro subscriptions I’d love feedback from people actively using AI APIs: what provider should I add next, and what would make spend tracking more useful without turning this into another dashboard?