Alpaca
Alpaca
Realtime and historical market data on all US equities and ETFs
Covers all US equities and ETFs
Check the docs depth and real endpoint shape before assuming production fit.
Obtain an API key to authenticate requests. Refer to the official documentation for endpoint details and usage guidelines.
Uptime · 30-day window
About this API
The Alpaca API provides realtime and historical market data specifically for all US equities and ETFs. It is designed for developers and financial professionals who need access to accurate and timely market information for analysis, trading, or portfolio management.
Users can leverage this API to build applications that require up-to-date stock prices, historical market trends, or ETF data. Its focus on US markets makes it relevant for those targeting American financial instruments.
With authentication via API key, the API ensures secure access to market data. The availability of both realtime and historical data supports a wide range of financial applications, from live trading dashboards to backtesting strategies.
What you can build
- 1Display realtime stock prices
- 2Generate historical market charts
- 3Build equity trading dashboards
- 4Analyze ETF performance trends
Strengths & limitations
Strengths
- Covers all US equities and ETFs
- Provides realtime and historical data
- Focused on market data
Getting started
Obtain an API key to authenticate requests. Refer to the official documentation for endpoint details and usage guidelines.
FAQ
Do I need an API key to use the Alpaca market data API?+
Yes, an API key is required to authenticate and access the data.
What types of market data does the API provide?+
It provides realtime and historical data for all US equities and ETFs.
Is HTTPS required to access the API?+
Most APIs of this type require HTTPS for secure data transmission.
Can I use this API directly from a browser?+
Usage from browsers depends on CORS support, which is not specified here.
Technical details
- Auth type
- api_key
- Pricing
- free
- Protocols
- REST
- Response time
- 1288 ms
- Last health check
- 8/14/2026, 5:29:56 AM