Best Broker APIs for Algorithmic Trading (2026)
Brokers with public trading APIs. Commissions and exchange fees are not included in plan prices.
Comparison
| Asset classes | Real-time | WebSocket | Rate limits | ||||
|---|---|---|---|---|---|---|---|
| AlpacaBroker + data | Free tier | $99 | 7+ | us-stocks, options, crypto | Free: IEX real-time websocket; Plus: all US exchanges | yes | Free: 200 calls/min; Algo Trader Plus: unlimited |
| IBKR API (Interactive Brokers)Broker | unknown | $1.5 | unknown | stocks, options, futures, forex, bonds, funds, prediction-markets | real-time with subscriptions | unknown | unknown |
| TradierBroker | Free tier | $10 | unknown | stocks, options, futures | unknown | unknown | unknown |
| TradovateBroker | Free tier | $99 | unknown | futures, event-contracts | Top of book data with funded account | unknown | unknown |
— means not stated on official pages. Not investment advice.
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