Use when an agent needs the latest market price of a listed instrument: AAPL, MSFT, NVDA, SPY, ^GSPC (S&P 500), ^IXIC, EURUSD=X, GC=F (gold futures), BTC-USD, 7203.T (Tokyo), VOW3.DE (Xetra). Returns price, previous close, absolute and percent change, day high/low, volume, 52-week high/low, exchange, currency, instrument type, market time and a Yahoo Finance link. Use /v1/search first if you only know the company name. Data may be delayed by the source. Paid tool: x402 USDC on Base, $0.002 per successful call; call without payment to receive the PaymentRequired object.