Free end of day stock market data and historical quotes for many of the world's top exchanges including NASDAQ, NYSE, AMEX, TSX, OTCBB, FTSE, SGX, Find and Explore ready-to-use Stock Market Datasets. stock data, s&p 500, finance vix, oil prices, natural gas prices, gold prices, nyse listings, nasdaq listings. What is stock market data API? Stock market data APIs offer real-time or historical data on financial assets that are currently being traded in the markets. These APIs usually offer prices of public stocks, ETFs, ETNs. These data can be used for generating technical indicators which are the foundation to build trading strategies and monitor the market. Data. In this story, I mainly care about price information.