Alpaca

I've been using Alpaca for a while now, and I have to say their API is one of the best I've worked with in the trading space. The API documentation is clean, clear, and easy to follow, which made it super smooth to get my trading bot up and running. Whether you're placing trades, pulling historical data, or managing your account, everything is well-structured and thoughtfully designed. They also provide websocket support for live market data and order updates, which has been rock-solid in my experience. As a developer, I really appreciate how developer-friendly the platform is. If you're building your own algo trading tools or just exploring automated trading, Alpaca is definitely worth trying.