API for Stock Trading

Trade with algorithms, connect with apps, build services — all with commission-free stock trading API

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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
Registered securities broker
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 enviroment
We’ve got your back—test your work before deploying to production
Inclusive API
SDKs are available in multiple languages including Python, .NET/C#, Go, Node
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Registered securities broker

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 www.sipc.org.

Alpaca 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 investors in the industry globally. We are proud to be supported by the love of enthusiastic community members on various platforms.

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