Historical stock API

Historical OHLCV API for charts and backtests

Request daily open, high, low, close, and volume by symbol and date range. The same series powers Data Captain charts, indicators, and buy-and-hold simulations.

Try backtesting API documentation

Key endpoints

GET/api/stocks/:symbol/history
Date-range OHLCV
GET/api/stocks/:symbol/candles
Chart-ready candles
POST/api/backtest/buy-and-hold
Simulate returns from history
GET/api/etf/SPY
Latest price + metadata

Why teams use Data Captain

Aligned history for analytics

Use one history source for charts, RSI/SMA overlays, and portfolio backtests — avoid mismatched vendor series.

Date-range requests

Pass start and end dates, validate first/last trading days, and cache stable windows in your app.

Built for SPY, QQQ, VOO workflows

Common benchmarks are first-class. Search the ETF explorer for any symbol with loaded price history.

Common use cases

Candlestick and line charts
CAGR and max drawdown calculators
ETF comparison pages
Quant research notebooks

FAQ

How far back does history go?

Coverage depends on imported market data (typically from 2010 onward for US ETFs in the priced universe). Check /status for latest price date and row counts.

Are prices adjusted?

Imported series prioritize split- and dividend-adjusted closes where available from the source files. Document your assumptions when publishing returns.

Stock market API →Technical indicators API →Historical ETF data guide →

Ship a market-data prototype this week

Start free