$ curl -H "X-API-Key: sk_live_***"
  "https://api.groundapi.net/v1/finance/stock?symbol=600519"

{ "symbol": "600519", "name": "Kweichow Moutai",
  "price": "1580.00", "change_pct": "+1.2%" }

✓ 200 OK — 128ms