How this works: there's no free, key-free real-time feed for interbank spot gold, so this tracks PAXG (Pax Gold) on Binance — a token backed 1:1 by physical gold in custody, which trades live and closely mirrors the XAUUSD spot price. It can drift a few dollars from the interbank quote, especially on weekends when forex markets are closed but crypto keeps trading. Treat it as a strong live proxy, not the official fix price.