A Stock API Provides Market Data for Apps Within Feed and Usage Limits

Summary: A stock API gives an application programmatic access to prices and related financial data, but what can you build with it? Charts, watchlists, research tools, and alerts are common uses; their reliability depends on the feed, timestamps, data definitions, and permitted use. A latest trade, a bid–ask quote, and a daily price bar describe different things, while an open source client library grants no automatic rights to redistribute the underlying data.

What a stock API actually provides

A stock API is an interface through which software requests or receives stock-related data. An application can use it to retrieve recent prices, download historical observations, or subscribe to updates. Some services also expose company fundamentals, corporate actions, or news through separate endpoints.

The interface makes data accessible to code.…