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Alpaca

Alpaca

UnknownFreefinance

Realtime and historical market data on all US equities and ETFs

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Use it when

Covers all US equities and ETFs

Watch for

Check the docs depth and real endpoint shape before assuming production fit.

First check

Sign up to obtain an API key. Use the key to authenticate requests to access realtime and historical market data.

Auth
api_key
CORS
No
HTTPS
Yes
Signup
Required
Latency
1250 ms
Protocol
REST
Pricing
free

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01

About this API

Alpaca provides access to realtime and historical market data for all US equities and ETFs. It is designed for developers and financial applications that require accurate and timely stock market information.

The API supports retrieving data on a wide range of US-listed securities, enabling users to build tools for market analysis, trading strategies, or financial dashboards. Authentication is handled via API key, ensuring secure access to the data.

Alpaca's focus on US equities and ETFs makes it relevant for applications targeting the American stock market, offering both current and past market data to support diverse financial use cases.

02

What you can build

  • 1Display realtime US stock prices
  • 2Generate historical equity price charts
  • 3Build ETF market data dashboards
  • 4Validate stock market trends
03

Strengths & limitations

Strengths

  • Covers all US equities and ETFs
  • Provides realtime and historical data
  • API key authentication
04

Example request

Generic template — replace <endpoint> with the real path from the docs.
curl https://alpaca.markets/docs/api-documentation/api-v2/market-data/alpaca-data-api-v2/<endpoint> \
  -H "Authorization: Bearer $API_KEY"
# Some providers use X-Api-Key instead — verify in the docs.
05

Getting started

Sign up to obtain an API key. Use the key to authenticate requests to access realtime and historical market data.

06

FAQ

Do I need an API key to use Alpaca?+

Yes, Alpaca requires an API key for authentication to access its data.

What types of market data does Alpaca provide?+

It provides realtime and historical data for US equities and ETFs.

Can I use Alpaca API from a browser?+

Using the API from a browser depends on CORS support, which is not specified.

Is HTTPS required to access Alpaca API?+

While not explicitly stated, HTTPS is generally required for secure API access.

07

Technical details

CORS: NoHTTPS: YesSignup: YesOpen source: No
Auth type
api_key
Pricing
free
Protocols
REST
Response time
1250 ms
08

Tags

financemarket-datastocksequitiesetfs