Request Message Format

To request trade data, after establishing the WebSocket connection, you must create a JSON object with the structure below and include it as a Data Type Object in the request message. For the full WebSocket data request message specification including Ticket and Format fields, please refer to the WebSocket Usage Guide document.

Field Name	Type	Description	Required	Default Value
type	String	`orderbook`	Required
codes	List<String>	List of trading pairs to receive. Must be requested in uppercase.	Required
is_only_snapshot	Boolean	Provide snapshot orderbook data only	Optional	`false`
is_only_realtime	Boolean	Provide real-time orderbook data only	Optional	`false`

Check the proper endpoint based on your region.

The examples in this page is written using Singapore fiat code(SGD). Set the quote currency to match your region. The base_url differs by country/region. Make sure to specify the correct region value for your environment.

Quotation
- Singapore (sg): wss://sg-api.upbit.com/websocket/v1
- Indonesia (id): wss://id-api.upbit.com/websocket/v1
- Thailand (th): wss://th-api.upbit.com/websocket/v1

Exchange
- Singapore (sg): wss://sg-api.upbit.com/websocket/v1/private
- Indonesia (id): wss://id-api.upbit.com/websocket/v1/private
- Thailand (th): wss://th-api.upbit.com/websocket/v1/private

ℹ️ Custom function for Orderbook Unit quantity is added

You can adjust the quantity of Orderbook Units only for orderbook-type packets. Please input the market code and unit quantity as follows.

Format: {code}.{count}

Example: SGD-BTC.5, SGD-ETH.5

Supported values for count: 1, 5, 15, 30

If an unsupported value is specified, it defaults to 30.

Examples

[
  {
    "ticket": "test"
  },
  {
    "type": "orderbook",
    "codes": ["SGD-BTC","SGD-ETH"]
  },
  {
    "format": "DEFAULT"
  }
]

[
  {
    "ticket": "test"
  },
  {
    "type": "orderbook",
    "codes": ["SGD-BTC","SGD-ETH"]
  },
  {
    "format": "SIMPLE_LIST"
  }
]

Subscription Data Specification

The current price snapshot or real-time stream data is returned as follows.

Field Name	Abbreviation	Description	Type	Example Value
type	ty	Type	String	`orderbook`
code	cd	Trading pair code	String	`SGD-BTC`
total_ask_size	tas	Total ask size	Double
total_bid_size	tbs	Total bid size	Double
orderbook_units	obu	Orderbook units	List of Objects
orderbook_units.ask_price	obu.ap	The lowest sell (ask) price in the orderbook	Double
orderbook_units.bid_price	obu.bp	The highest buy (bid) price in the orderbook	Double
orderbook_units.ask_size	obu.as	Sell (ask) quantity at the corresponding ask price	Double
orderbook_units.bid_size	obu.bs	Buy (bid) quantity at the corresponding bid price	Double
timestamp	tms	Timestamp (ms)	Long
stream_type	st	Stream type	String	`SNAPSHOT` : Snapshot `REALTIME` : Real-time

Examples

[
  {
    "type": "orderbook",
    "code": "SGD-BTC",
    "timestamp": 1746602359173,
    "total_ask_size": 0.68780013,
    "total_bid_size": 0.78754733,
    "orderbook_units": [
      {
        "ask_price": 125056.0,
        "bid_price": 124743.0,
        "ask_size": 0.17,
        "bid_size": 0.17
      },
      {
        "ask_price": 125207.0,
        "bid_price": 124332.0,
        "ask_size": 0.09,
        "bid_size": 0.09
      },
      {
        "ask_price": 125416.0,
        "bid_price": 124167.0,
        "ask_size": 0.2,
        "bid_size": 0.2
      },
      {
        "ask_price": 126661.0,
        "bid_price": 122917.0,
        "ask_size": 0.01210697,
        "bid_size": 0.01844114
      },
      {
        "ask_price": 126786.0,
        "bid_price": 122716.0,
        "ask_size": 0.01142233,
        "bid_size": 0.0175997
      },
      {
        "ask_price": 126997.0,
        "bid_price": 122577.0,
        "ask_size": 0.01442522,
        "bid_size": 0.02204438
      },
      {
        "ask_price": 127288.0,
        "bid_price": 122283.0,
        "ask_size": 0.0139072,
        "bid_size": 0.02114427
      },
      {
        "ask_price": 127451.0,
        "bid_price": 122002.0,
        "ask_size": 0.01378211,
        "bid_size": 0.0203521
      },
      {
        "ask_price": 127946.0,
        "bid_price": 121665.0,
        "ask_size": 0.0128153,
        "bid_size": 0.01977116
      },
      {
        "ask_price": 127970.0,
        "bid_price": 121504.0,
        "ask_size": 0.0084267,
        "bid_size": 0.0129707
      },
      {
        "ask_price": 128351.0,
        "bid_price": 121372.0,
        "ask_size": 0.00766313,
        "bid_size": 0.04750075
      },
      {
        "ask_price": 128649.0,
        "bid_price": 121263.0,
        "ask_size": 0.00716242,
        "bid_size": 0.0123517
      },
      {
        "ask_price": 128849.0,
        "bid_price": 120969.0,
        "ask_size": 0.00690843,
        "bid_size": 0.01155361
      },
      {
        "ask_price": 128956.0,
        "bid_price": 120643.0,
        "ask_size": 0.00732903,
        "bid_size": 0.01096038
      },
      {
        "ask_price": 129000.0,
        "bid_price": 120436.0,
        "ask_size": 0.03875968,
        "bid_size": 0.01039539
      },
      {
        "ask_price": 129066.0,
        "bid_price": 120095.0,
        "ask_size": 0.00655781,
        "bid_size": 0.01010256
      },
      {
        "ask_price": 129228.0,
        "bid_price": 119824.0,
        "ask_size": 0.00684494,
        "bid_size": 0.00948499
      },
      {
        "ask_price": 129231.0,
        "bid_price": 119618.0,
        "ask_size": 0.00626955,
        "bid_size": 0.00903197
      },
      {
        "ask_price": 129515.0,
        "bid_price": 119279.0,
        "ask_size": 0.00595153,
        "bid_size": 0.00853212
      },
      {
        "ask_price": 129579.0,
        "bid_price": 119120.0,
        "ask_size": 0.0064701,
        "bid_size": 0.00172935
      },
      {
        "ask_price": 130312.0,
        "bid_price": 118969.0,
        "ask_size": 0.00553463,
        "bid_size": 0.0080544
      },
      {
        "ask_price": 130535.0,
        "bid_price": 118613.0,
        "ask_size": 0.00450619,
        "bid_size": 0.00770287
      },
      {
        "ask_price": 130797.0,
        "bid_price": 118290.0,
        "ask_size": 0.00413189,
        "bid_size": 0.00712616
      },
      {
        "ask_price": 131288.0,
        "bid_price": 118107.0,
        "ask_size": 0.00452539,
        "bid_size": 0.00674375
      },
      {
        "ask_price": 131399.0,
        "bid_price": 117808.0,
        "ask_size": 0.00369111,
        "bid_size": 0.00658978
      },
      {
        "ask_price": 131510.0,
        "bid_price": 117595.0,
        "ask_size": 0.00417261,
        "bid_size": 0.0060327
      },
      {
        "ask_price": 131727.0,
        "bid_price": 117300.0,
        "ask_size": 0.00342738,
        "bid_size": 0.00566733
      },
      {
        "ask_price": 131821.0,
        "bid_price": 117156.0,
        "ask_size": 0.00392284,
        "bid_size": 0.00538776
      },
      {
        "ask_price": 131867.0,
        "bid_price": 116805.0,
        "ask_size": 0.00326427,
        "bid_size": 0.00533339
      },
      {
        "ask_price": 132107.0,
        "bid_price": 116593.0,
        "ask_size": 0.00382137,
        "bid_size": 0.00494292
      }
    ],
    "stream_type": "SNAPSHOT"
  }
]

 [
  {
    "ty": "orderbook",
    "cd": "SGD-BTC",
    "tms": 1749471183353,
    "tas": 0.74160598,
    "tbs": 0.72452668,
    "obu": [
      {
        "ap": 138696,
        "bp": 138349,
        "as": 0.17,
        "bs": 0.17
      },
      {
        "ap": 138948,
        "bp": 138025,
        "as": 0.09,
        "bs": 0.09
      },
      {
        "ap": 139274,
        "bp": 137887,
        "as": 0.2,
        "bs": 0.2
...
    "st": "SNAPSHOT"
  }
]