Best Futures Market Data APIs (2026)
Vendors covering futures, sorted by lowest listed paid plan.
Comparison
| Asset classes | Real-time | WebSocket | Rate limits | ||||
|---|---|---|---|---|---|---|---|
| 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 |
| Massive (formerly Polygon)Market data | Free tier | $29 | 20+ | us-stocks, options, indices, forex, futures | real-time on Stocks Advanced; 15-min delayed on Starter/Developer | yes (Starter and up) | Free: 5 calls/min; paid: unlimited |
| TradovateBroker | Free tier | $99 | unknown | futures, event-contracts | Top of book data with funded account | unknown | unknown |
| DatabentoMarket data | Free tier | Pay-as-you-go ($/GB); $125 free credits | 16+ | futures, options, us-stocks | live data on subscription plans | Raw TCP + client libraries (live streaming) | Unlimited downloads, streaming and API calls on subscriptions |
— means not stated on official pages. Not investment advice.
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