Build a Live Nano (XNO) → Fiat Converter for Your Site — Free API, No Signup, Full Code

That little "type an amount, see it in your currency" widget looks like it needs a paid data plan and an API key. It doesn't. Here's a live XNO→fiat converter built on a free, keyless, CORS-enabled API — no signup, no backend — plus the complete tested widget: bidirectional, 10 currencies, 24h change, auto-refresh, and automatic fallback.