Alpaca Broker API
Launch your own commission-free trading app
Alpaca Broker API launched on April 22, 2021 with 357 votes, #37 of 3,754 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 5 years on.
In plain words
Alpaca Broker API is a developer tool that enables businesses to build their own commission-free trading applications. It provides API access to core brokerage services including account opening, fund transfers, rewards programs, U.S. stock trading, and fractional share trading. The platform is designed for developers and fintech companies seeking to launch branded trading apps without managing their own brokerage infrastructure.
written from the facts on this page · September 2026
From the sources
Alpaca Broker API allows us to offer each component of the brokerage service including opening accounts, booking money movements, giving out rewards, commission-free trading of U.S. stocks, fractional shares trading, and more.
Built with developers in mind, Alpaca's modern APIs make it easy for businesses to embed stock, options and crypto trading into their fintech app.
Broker API is fully equipped with everything you need to launch and scale. Embed fractional stocks, options, fixed income, crypto, high-yield cash, back-office operations, and more—directly with Alpaca. Orders placed outside regular trading hours (9:30 a.m. – 4:00 p.m. ET) may experience price fluctuations, partial executions, or delays due to lower liquidity and higher volatility. Orders not designated for extended hours execution will be queued for the next trading session. Additionally, fractional trading may be limited during extended hours. For more details, please review Alpaca Extended Hours & Overnight Trading Risk Disclosure. Fixed income securities can experience a greater risk of…from alpaca.markets
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