Polygon.io
Real-time and historical market data for stocks, options, forex, and crypto via REST and WebSocket.
Polygon.io is listed in Finance & Markets.
Key metrics
5/min Rate limit Free plan: 5 API calls/minute, end-of-day and 2-year historical data. Free API key required.
Gotchas
No gotchas documented yet. Contribute one if you know a constraint we missed.
Labels
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Key required
Requires an API key (free to obtain) before use.
stocks options forex crypto market-data