TokenGuard

What it does

TokenGuard is a real-time AI cost monitoring dashboard for developers. One line of code wraps your existing OpenAI, Anthropic, or Gemini calls and instantly shows you what every feature, model, and customer costs — before the invoice arrives. - Real-time spend tracking by feature, model, and customer tell you exactly which cheaper model to use - Per-customer profitability — see which customers cost more than they pay Free tier available — no credit card required.

One line of code shows you exactly what every AI feature, model, and customer costs in real time, before the invoice arrives.

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  TokenWatchMar 2026 · tokenwatch-ten.vercel.app · ▲3

  Hey HN! Built this after watching engineering teams repeatedly get surprised by AI API invoices — no visibility into spend until the bill landed. TokenWatch connects to your OpenAI, Anthropic, and Gemini keys and gives you: - Real-time spend dashboard across projects - Budget thresholds with proactive alerts - Anomaly detection for unusual cost spikes - Duplicate call detection (biggest source of wasted spend I've seen) Free tier supports up to 3 AI systems. Built this in ~2 days as a solo project. Happy to answer anything about the build or the problem space.

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