KRX API

Korea Exchange provides official Korean market data. Use the official KRX OPEN API portal to request a key and approval for each service. The request URL is specific to the approved API specification.

Key functions (via pykrx community library)

Function	Description
stock.get_market_ticker_list()	All tickers by market
stock.get_market_ohlcv()	OHLCV for date range
stock.get_market_cap()	Market cap data
stock.get_market_fundamental()	PER/PBR/dividend yield
stock.get_etf_ticker_list()	ETF tickers
stock.get_etf_ohlcv()	ETF OHLCV
stock.get_index_ticker_list()	Index tickers
bond.get_otc_ticker_list()	Bond tickers

Python example: KRX stock data via pykrx

# pykrx is a community wrapper (not official) for KRX data
# pip install pykrx

from pykrx import stock

# KOSPI tickers
tickers = stock.get_market_ticker_list(market="KOSPI")
print(f"KOSPI tickers: {len(tickers)}")

# Samsung Electronics (005930) OHLCV
df = stock.get_market_ohlcv("20240101", "20241231", "005930")
print(df.tail(3))

# ETF tickers
etf_tickers = stock.get_etf_ticker_list()
print(f"ETF count: {len(etf_tickers)}")

Notes:

• pykrx scrapes KRX web endpoints; not an official API client
• The OPEN API terms limit use to noncommercial purposes, prohibit third-party redistribution, and cap each key at 10,000 requests per day. Review the official terms before integrating
• Korean market holidays differ from US — use pykrx’s calendar or KRX holiday data