IEX Cloud provides both real-time stock prices and 15-minute delayed stock prices during market trading hours for U.S. stocks and ETFs. You can access this data via the Quote and Intraday Prices endpoints.
Real-time prices are based on all trades that occur on the Investors Exchange (IEX). 15-minute delayed stock prices reflect activity from all U.S. exchanges, and is provided by the Securities Information Processor / Consolidate Tape Association (SIP).
While real-time prices for Nasdaq-listed stocks are available to all users, 15-minute delayed price data for Nasdaq-listed securities requires UTP authorization. Learn more here.
Note that real-time prices available via the IEX Cloud API are different from real-time prices available via direct connection from IEX. Learn more.