Stock Market API
Institutional-grade stock data for your next big project. Real-time and historical via REST and WebSockets.
Latency
<20ms
Typical websocket delivery
History
20+ years
Aggregates & trades
Access
REST / WS / S3 / SQL
Same data surface
Popular endpoints
/v2/aggs/ticker/{ticker}/range/{multiplier}/{timespan}/{from}/{to}
/v3/trades/{ticker}
/v3/quotes/{ticker}
/v2/snapshot/locale/us/markets/stocks/tickers/{ticker}
Common use cases
Backtests and research pipelines
Real-time watchlists and alerts
Charting, analytics, and execution tooling
Get started
Create an account to generate an API key and start building.
Frequently asked questions
Do you offer pre-market and after-hours data?+
Yes—coverage depends on the dataset and plan. Real-time streaming includes extended hours where available.
Is data adjusted for splits and dividends?+
We provide adjusted and unadjusted views depending on endpoint and parameters.
Can I use REST and WebSockets together?+
Yes. Most apps combine REST for historical/backfill and WebSockets for streaming updates.
Build with finmartdata
Create an account, generate an API key, and start pulling market data in minutes.