Alpaca Broker API

Alpaca is a California-headquartered company that started in 2015 as a database and machine learning company and now provides developer-first APIs for stock, options and crypto trading. It lets fintechs, banks, wallets and brokers embed investing without building their own brokerage, clearing and custody stack. The company runs as a fully remote team of more than 250 employees in 25 countries.

The Broker API covers account opening, funding, trading and custody for US stocks and ETFs, multi-leg options and crypto, with recent additions such as 24/5 trading, high-yield cash sweep, fully paid securities lending, OmniSub sub-accounting and an Instant Tokenization Network for tokenized US stocks. Alpaca Clearing is a FINRA and SIPC member that self-clears through DTCC, FICC and OCC, and Alpaca Japan holds a securities licence in Japan. Partners shown on the site include SBI Holdings, eToro, Kraken, Bitso, Dime, Sarwa, Midas and GoTyme Bank.

• Account and funding APIs: Open, verify and fund brokerage accounts for end users.
• Multi-asset trading: Supports US stocks, ETFs, multi-leg options and crypto.
• 24/5 trading: Lets users trade US stocks around the clock on weekdays.
• OmniSub: Provides sub-accounting for omnibus brokerage setups.
• Securities lending and cash sweep: Adds fully paid lending and high-yield cash products.
• MCP Server: Enables trading through natural language with AI agents.

A Vietnamese securities company can add US stocks and ETFs to its trading app through a single API, subject to overseas investment rules. A digital bank in the region can offer fractional global investing to its customers. A fintech can build AI-assisted trading assistants on top of the MCP server.

Partners can launch US equity, options and crypto investing through APIs instead of building a regulated brokerage. The company reports more than 7 million brokerage accounts opened by partners in over 40 countries, 99.99% system uptime and 1.5 ms order processing. Self-clearing and add-on products such as securities lending and cash sweep give partners extra revenue lines.

Retail interest in global equities is rising across Asia, and digital banks and super apps want to add investing to deepen engagement. Brokerage-as-a-service APIs, tokenized stocks and AI-driven trading interfaces are lowering the cost of launching cross-border investment products through locally licensed partners.

Headquartered in California, started in 2015; co-founded by CEO Yoshi Yokokawa and CPO Hitoshi Harada. Backed by 320 million USD from investors including Portage, Spark Capital, Tribe Capital, SBI Holdings and Y Combinator; raised a 150 million USD Series D in January 2026. Acquired WealthKernel in 2025. ISO 27001:2022 and SOC 2 Type II.