About
Alpaca is a comprehensive, developer-first API platform for trading and embedding investing capabilities into applications. Designed for both individual algorithmic traders and fintech businesses, Alpaca provides a suite of products including a Trading API for executing algorithmic strategies, a Broker API for building end-to-end brokerage platforms, real-time and historical Market Data feeds, and an MCP (Model Context Protocol) Server that enables AI-powered natural language trading. Alpaca supports US Stocks & ETFs, Options (including multi-leg strategies like spreads and straddles), and Cryptocurrency. Key capabilities include 24/5 trading, TradingView and QuantConnect integrations, High Yield Cash accounts, Fully Paid Securities Lending, Stock Lending, and OmniSub sub-accounting for omnibus structures. The platform is trusted by millions of traders and hundreds of fintech companies and institutions. Use cases span fintech startups, digital wallets, broker-dealers, hedge funds, prop firms, robo advisors, and tokenization platforms. With zero-commission trading, REST and FIX API integration, SDKs (including Alpaca-Py), and a free signup tier, Alpaca lowers the barrier to building sophisticated, production-grade trading systems.
Key Features
- Trading & Broker APIs: Execute algorithmic trading strategies or build full brokerage platforms with REST and FIX API integration across stocks, options, and crypto.
- AI-Powered MCP Server: Trade using natural language via Alpaca's Model Context Protocol (MCP) Server, enabling AI-driven insights and order execution.
- Real-Time Market Data: Access real-time and historical stock market and crypto data feeds to power trading algorithms and financial applications.
- Multi-Leg Options & 24/5 Trading: Backtest and execute complex multi-leg options strategies and trade around the clock with 24/5 session-aware order routing.
- High Yield Cash & Securities Lending: Earn competitive APY on uninvested cash with FDIC coverage, and generate passive income through Fully Paid Securities Lending and Stock Lending programs.
Use Cases
- Building automated algorithmic trading bots that execute buy/sell orders based on custom strategies using Alpaca's REST or FIX API.
- Developing fintech applications such as robo advisors, digital wallets, or investment apps with embedded brokerage capabilities via the Broker API.
- Integrating AI and LLM-based natural language interfaces into trading workflows using Alpaca's MCP Server.
- Running backtests and live execution of multi-leg options strategies (spreads, straddles, iron condors) with zero-commission access.
- Enabling passive income streams for clients through Fully Paid Securities Lending or generating platform revenue via Stock Lending programs.
Pros
- Developer-Friendly SDKs: Comprehensive documentation, SDKs (including Alpaca-Py), code snippets, and an active community Slack and GitHub make onboarding straightforward.
- Zero-Commission Trading: Multi-leg options and standard trades are offered with zero commissions, reducing costs for algorithmic and high-frequency traders.
- Broad Asset Class Support: Covers US Stocks & ETFs, Options, and Cryptocurrency, making it a versatile platform for diverse trading and fintech use cases.
- AI Integration via MCP Server: The built-in MCP Server allows developers to integrate LLM-based natural language trading, bridging modern AI workflows with live brokerage execution.
Cons
- US-Centric Asset Coverage: Primary support is for US-listed stocks, ETFs, and select crypto; international equities and other global assets are not supported.
- Complexity for Non-Developers: The platform is heavily API-driven and code-oriented, making it less accessible to non-technical retail traders without development skills.
- Geographic Restrictions: Certain features like tokenization services have additional geographic restrictions that may limit availability for international users.
Frequently Asked Questions
What is Alpaca's Trading API?
Alpaca's Trading API is a developer-first REST and FIX API that allows algorithmic traders to automate buy/sell orders across US stocks, ETFs, options, and crypto with features like 24/5 trading and real-time market data.
What is the difference between the Trading API and the Broker API?
The Trading API is designed for individual algorithmic traders and developers building personal strategies, while the Broker API is an end-to-end brokerage platform for businesses (e.g., fintechs, robo advisors, digital wallets) that want to offer investing capabilities to their own customers.
What is Alpaca's MCP Server?
Alpaca's MCP (Model Context Protocol) Server enables AI-powered trading using natural language. Developers can integrate LLMs to interpret trading instructions and execute orders through Alpaca's brokerage infrastructure.
Is Alpaca free to use?
Alpaca offers a free signup with no commission on trades. Certain premium features and higher-tier API access may have associated costs, making it a freemium platform.
What asset classes does Alpaca support?
Alpaca supports US Stocks & ETFs, Options (including multi-leg strategies like spreads, straddles, and condors), and Cryptocurrency, with real-time and historical market data available for all asset classes.
