Korea Stock Data API

The Infoway API provides comprehensive real-time stock market data for the Korea Exchange (KRX), covering approximately 2,600 listed companies on the Korean stock market.

1. Retrieving the Korea Stock List

Infoway maintains an updated list of approximately 2,600 Korea securities. You can obtain the list in two ways:

Option 1 — Download from the Web Portal

Log in to your Infoway account and download the latest stock excel list file from the Downloads section at the right side of the dashboard.

Option 2 — Query via API

You can also retrieve the list programmatically through the HTTP Symbol List API. Refer to the GET /symbol-list documentation for usage details.

The stock list is updated periodically to include newly listed companies and remove delisted securities. To ensure your application always reflects the latest market data, it is recommended to refresh the list regularly.

2. Query Methods

Infoway offers two primary data-access methods, optimized for different use cases:

Method	Ideal Use Case	Description
HTTP API	Scheduled or batch data queries	Flexible pull-based access to company fundamentals, historical quotes, real-time candlesticks, and order book data.
WebSocket Streaming	Low-latency, real-time monitoring	Push-based streaming for the fastest access to live market updates.

Both HTTP and WebSocket interfaces are subject to rate limits. See the Rate Limit Policy section for detailed constraints.

3. Market Data Schemas

The Infoway Korea Stock Real-Time Market Data API supports multiple categories of data feeds.

3.1 Real-Time Candlestick (OHLCV) Data

Provides live candlestick data for Korea securities, including open, high, low, close prices, trading volume, and turnover value. This allows users to visualize price movements and analyze short-term market trends.

You can access this data via:

• HTTP Request: see GET /candlestick

• WebSocket Subscription: see WebSocket /candlestick topic

Example Response

{
  "s": "005930.KS",   
  "respList": [
    {
      "t": "1781481600",  
      "h": "344000.00",   
      "o": "344000.00",  
      "l": "340000.00",    
      "c": "341500.00",   
      "v": "972079.00000",   
      "vw": "333747120093.07000",    
      "pc": "-0.73%",    
      "pca": "-2500.00000"    
    }
  ]
}

3.2 Latest Trade

Retrieve the latest trade for any listed Korea company, including price, volume, and trade direction.

Access methods:

• HTTP API: GET /trades

• WebSocket: Subscribe to /trades

Example Response

{
  "s": "005930.KS",   
  "t": 1773037319456,   
  "p": "341500.00",   
  "v": "2.0",   
  "vw": "2598.00",    
  "td": 0    
}

3.3 Order Book

Provides real-time bid/ask depth, showing market liquidity and order book structure.

Access methods:

• HTTP API: GET /market-depth

• WebSocket: Subscribe to /Depth

Example Response

{
  "s": "005930.KS",   
  "t": 1773037524808,   
  "a": [   
    [
      "341500.00",   
    ],
    [
      "1.0",   
    ]
  ],
  "b": [    
    [
      "341500.00",    
    ],
    [
      "172.0",   
    ]
  ]
}

3.4 Korea Stock Fundamentals

Retrieve fundamental information for listed companies, including corporate names, share structure, exchange details, and key financial indicators. (GET / symbol-fundamentals)

Example Response

{
    "ret": 200,
    "msg": "success",
    "traceId": "1407b1f0-b271-4b39-a905-67e538ce83b9",
    "data": [
        {
            "symbol": "005930.KS",
            "market": "KS",
            "name_cn": "",
            "name_en": "Samsung Electronics Co., Ltd.",
            "name_hk": "",
            "exchange": "KRX",
            "currency": "KRW",
            "lot_size": null,
            "total_shares": null,
            "circulating_shares": null,
            "hk_shares": null,
            "eps": "12475.8691",
            "eps_ttm": null,
            "bps": null,
            "dividend_yield": "0.00471186440677966",
            "stock_derivatives": null,
            "board": "Electronic Technology"
        }
    ]
}

3.5 Trading Days & Market Hours

Retrieve trading session schedules and trading calendar information for the Korea market. This ensures your system is synchronized with market open/close times and holiday periods.

Query Methods

• GET /trading-hours — Returns daily trading sessions and their start/end times

• GET /trading-days — Returns valid trading days and half-days

Example: Trading Hours

{
    "market": "KS",
    "remark": "韩国股市",
    "trade_schedules": [
        {
            "begin_time": "09:00:00",
            "end_time": "15:30:00",
            "type": "NormalTrade"
        }
    ]
}

Example: Trading Days

{
  "trade_days": [
    "20260202",
    "20260203",
    "20260204",
    "20260205",
    "20260206",
    "20260209",
    "20260210"
  ],
  "half_trade_days": []
}