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API for Stock and Crypto Trading

Trade with algorithms, connect with apps, and build services with our easy to use APIs

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Simple modern API

Built for developers & traders

Commission-free API
Building with the Alpaca API can make stock trading commission-free
OAuth integration
Exposing your API info is tired—use OAuth to keep your key private
Alpaca securities
Alpaca Securities LLC is a member of FINRA and SIPC
Margin and short selling
A wide array of advanced investing and trading strategies are supported
Testing environment
We’ve got your back—test your work before deploying to production
Inclusive API
SDKs are available in Python, .NET/C#, Go, Node, and more

Alpaca securities

Alpaca Securities LLC is a member of Financial Industry Regulatory Authority, Inc. (FINRA).
You can check the background of Alpaca Securities on FINRA’s BrokerCheck.
Alpaca Securities is also a member of SIPC - securities in your account are protected up to $500,000.
For details, please visit

Alpaca DB is a technology company headquartered in the bay area California that modularizes the world’s asset management activities. We are a team of diverse background individuals with deep financial and technology expertise, backed by some of the top venture capitalists in the industry globally. We are proud to be supported by the love of enthusiastic community members on various platforms.

Spark Capital
Social Leverage
Tribe Capital
Horizons Ventures
Y Combinator
@aissoftware on Twitter thinks Alpaca is the best trading software @CindyBiSV on Twitter @kangaroo on Twitter thinks Alpaca has the best API and docs @datarade on Twitter thinks Alpaca is awesome @OpenQuant on Twitter thanks Alpaca for their support and API @QuantSymplectic on Twitter likes Alpaca's nice and clean setup