AlpacaFree tier
Options Data APIs
Developer trading API with commission-free multi-leg options, paper trading and market data.
From $99/moDetails →
optionsDX
Historical options data downloads, including SPX chains, for backtesting.
Price not listed
Visit optionsDX ↗Opens the official siteBest for
DIY backtesters who need free historical chains
Notable features
- Historical SPX option chains
- Intraday options data
- US and crypto markets
- Downloadable files
Pricing notes
Paid data pricing not captured.
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Market data APIs for options, stocks and more; polygon.io now redirects here.
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Real-time and historical options, stock and index data with tick-level NBBO quotes.
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