Alpaca Fractional Trading API
Commission-free API to trade & invest for as little as $1
Alpaca Fractional Trading API launched on March 25, 2021 with 271 votes, #57 of 3,696 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 Fractional Trading API is a commission-free platform that enables developers to build trading and investment applications through an API. It allows users to trade and invest with minimal capital, starting from as little as $1, and supports fractional share purchases. The service is designed for developers and fintech companies seeking to create quantitative trading models and financial applications without commission fees.
written from the facts on this page · September 2026
From the sources
Alpaca offers the world’s first commission-free fractional trading API to allow us to build more flexible quant trading models and fintech apps.
Offering the world's first commission-free fractional trading API for algorithmic trading & building apps
Brokerage services are provided by Alpaca Clearing, member FINRA / SIPC , a wholly-owned subsidiary of AlpacaDB, Inc. Brokerage services are provided to customers who can write automated investment code and self-direct their own investments. Alpaca brokerage services are only provided to customers who agree to electronically sign agreements and agree to receive messages, confirmations, and statements electronically. Is Alpaca right for me? This is not an offer, solicitation of an offer, or advice to buy or sell securities or cryptocurrencies, or open a brokerage account or cryptocurrency account in any jurisdiction where Alpaca Clearing or Alpaca Crypto respectively, are not registered or…from alpaca.markets
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