Marketstack first released its API-driven market data product in 2018. The original thought behind the Marketstack API was a cost-effective alternative to Yahoo Finance. Just a couple of years later, the Marketstack API is one of the most popular solutions for real-time, intraday, and historical stock data. It supports over 125,000 stock tickers from 72 stock exchanges across the globe.
The API supports millions of concurrent API requests each day. In addition to basic stock and rate information, the API provides metadata, company information, and exchange information. The API exists as part of the broader apilayer portfolio of products which include currencylayer, ipapi and scrapestack.
The API is RESTful. Requests use an HTTP GET structure and responses are delivered in JSON format. Features cover data associated with end of day data, intraday data, real-time updates, historical data, tickers, exchanges, currencies, and timezones. For more details, check out the API documentation.