Alpaca Data API to Access Real-Time Stock Market Data for Free
Market data matters when you trade. That’s why we are excited to announce the Alpaca Data API, a brand new data product that we built from scratch to create the de facto standard market data offering for developers.
We have worked hard to make the Alpaca Data API your go-to data API for building your algorithmic trading strategies or trading/investing applications. The Alpaca Data API provides real-time stock price data with up to 99.95% price accuracy* compared to other expensive consolidated market data feeds. Best of all, it’s completely free to use.
All Alpaca users, regardless of account type or country of residence, can now access the Alpaca Data API.
Alpaca
*(as measured using 10-second snapshots of the Alpaca Data API last price vs. the SIP last price)
Key Offerings of Alpaca Data API
5 Stock Exchanges, up to 99.95% Price Accuracy*
With the Alpaca Data API, you get access to data from 5 top US stock exchanges, providing you with comprehensive coverage of trading activity across the entire US stock market.
This robust consolidated data feed enables you to research, develop, and run your trading strategies with more confidence. It also allows you to build trading applications where your end users can enjoy the benefits of high-quality display data. That’s because there is up to 99.95% price accuracy* between the Alpaca Data API and the SIP feed (100% coverage data feed) for actively traded stocks and ETFs.
*(as measured using 10-second snapshots of the Alpaca Data API last price vs. the SIP last price)
True Streaming Market Data via Websockets
Regardless of your Alpaca account type, all Alpaca users now have access to true event-based streaming market data via Websockets, instead of being limited to pulling minute or daily bar data.
This allows you to reduce your API calls and be more aware of market movements. You can also expect more stability in running your trading strategies and trading apps.
Large Historical Data Set
The Alpaca Data API provides you with 5 years of historical data, allowing you to develop and test your strategies with confidence.
Customizable Bar Data
Why be limited to only one period of bar data? The Alpaca Data API gives you access to 1, 5, 15, 30, and 60 minute bar data, in addition to daily, weekly, and monthly bar data. This helps enable strategy development across multiple time horizons, from intraday scalping algorithms to long-term asset allocation or buy and hold strategies.
Evolution of the Alpaca Data API
We strongly believe that market data is an essential piece of the user journey for developers when we build anything related to the financial market. With that said, we plan to continue to upgrade and work on Alpaca Data API such as we have been making many updates to the Alpaca Trading API.
We truly appreciate your support for Alpaca’s API products, and we are looking forward to hearing from you about how you can utilize the Alpaca Data API.
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Brokerage services are provided by Alpaca Securities LLC (“Alpaca”), member FINRA / SIPC , a wholly-owned subsidiary of AlpacaDB, Inc. Technology and services are offered by AlpacaDB, Inc.
Market prices, data and other information available through Alpaca are not warranted as to completeness or accuracy and are subject to change without notice. System response and account access times may vary due to a variety of factors, including trading volumes, market conditions, system performance, and other factors. A more complete description of the impact these factors may have can be found in our risks of automated trading systems section .