Quick Start

Brief Introduction

Welcome to KuCoin’s developer documentation for high-frequency trading. This document provides an overview of high-frequency trading features, as well as APIs.

KuCoin API: REST API

There are three types of REST APIs: User (private), Trading (private) and Market Data (public)

Update Preview

05/18/23:

【Modify】GET /api/v1/hf/orders/{orderId}?symbol={symbol}interface, add response parameter：cancelledSize、cancelledFunds、remainSize、remainFunds
【Modify】GET /api/v1/hf/orders/client-order/{clientOid}?symbol={symbol}interface, add response parameter：cancelledSize、cancelledFunds、remainSize、remainFunds
【Modify】GET /api/v1/hf/orders/activeinterface, add response parameter：cancelledSize、cancelledFunds、remainSize、remainFunds
【Modify】GET /api/v1/hf/orders/doneinterface, add response parameter：cancelledSize、cancelledFunds、remainSize、remainFunds

04/23/23:

【Add】AddPOST /api/v1/hf/orders/dead-cancel-allinterface
【Add】AddGET /api/v1/hf/orders/dead-cancel-all/queryinterface

04/01/23:

【Add】AddPOST /api/v1/hf/orders/alterinterface
【Add】AddDELETE /api/v1/hf/orders/sync/{orderId}interface
【Add】AddDELETE /api/v1/hf/orders/sync/client-order/{clientOid}interface
【Add】AddPOST /api/v1/hf/orders/multi/syncinterface
【Add】AddGET /api/v1/hf/orders/active/symbolsinterface
【Modify】ModifyPOST /api/v1/hf/orders/multiinterface，Input parameters: support batch orders for different trading pairs; output parameters: the return value has been optimized, only orderId and order results are returned

11/08/22:

【Deprecate】Deprecate POST /api/v1/accounts interface.

10/18/22:

【Modify】Modify the limit request parameter description in the GET /api/v1/hf/orders/done interface to "default 20, maximum 100".

User

Account

Internal Funds Transfers in high-frequency trading accounts

// request
{
    "amount":10,
    "currency":"USDT",
    "from":"trade",
    "to":"trade_hf",
    "clientOid":"b6ahe97ce32aed83g3c3f8f0"
}

// response
{
    "code":"200000",
    "data": {
        "orderId":"6305cbf0bd13850001e625b4"
    }
}

Users can transfer funds between their main account, trading account, and high-frequency trading account free of charge.

HTTP Request

POST /api/v2/accounts/inner-transfer

Example

POST /api/v2/accounts/inner-transfer

API Permissions

This API requires Trade permissions

Parameters

Parameters	Type	Mandatory	Description
clientOid	String	Yes	Client Order Id，a unique identifier created by the user, using UUID is recommended
currency	String	Yes	currency
from	String	Yes	Payment account type: `main`(main account), `trade`(trading account), `trade_hf`(high-frequency trading account)
to	String	Yes	Receiving account type: `main`(main account), `trade`(trading account), `trade_hf`(high-frequency trading account)
amount	String	Yes	Transfer amount, the precision is the precision of the currency multiplied by a positive integer

Return Value

Field	Description
orderId	Order ID for internal funds transfer

List high-frequency trading accounts

// response
{
    "code": "200000",
    "data": [
        {
            "balance": "3027.25165335",
            "available": "3027.25165335",
            "holds": "0",
            "currency": "USDT",
            "id": "2560047104",
            "type": "trade_hf"
        }
    ]
}

Get a list of high-frequency trading accounts.

HTTP Request

GET /api/v1/accounts

Example

GET /api/v1/accounts?currency=USDT&type=trade_hf

API Permissions

This API requires General permissions

Parameters

Parameters	Type	Mandatory	Description
currency	String	No	currency
type	String	No	Account type, `trade_hf`(high-frequency trading account)

Return Value

Field	Description
id	accountId
currency	The currency the account is associated with
type	Account type ,`trade_hf`(high-frequency trading account)
balance	Total funds
available	Available funds
holds	Funds frozen

Detail of the high-frequency trading account

// response
{
    "code": "200000",
    "data": {
        "balance": "9000000",
        "available": "9000000",
        "holds": "0",
        "currency": "YOP"
    }
}

Get the details of the high-frequency trading account

HTTP Request

GET /api/v1/accounts/{accountId}

Example

GET /api/v1/accounts/2051232768

API Permissions

This API requires General permissions

Parameters

Parameters	Type	Mandatory	Description
accountId	String	Yes	Path parameters, high-frequency trading account ID

Return Value

Field	Description
currency	The currency the account is associated with
balance	Total funds
available	Available funds
holds	Funds frozen

Get Transferrable Funds in high-frequency trading accounts

// response
{
    "code": "200000",
    "data": {
        "balance": "990.28419461",
        "transferable": "983.64866777",
        "available": "983.64866777",
        "holds": "6.63552684",
        "currency": "USDT"
    }
}

This API can be used to obtain the amount of transferrable funds in high-frequency trading accounts.

HTTP Request

GET /api/v1/accounts/transferable

Example

GET /api/v1/accounts/transferable?currency=USDT&type=TRADE_HF

API Permissions

This API requires General permissions

REQUEST RATE LIMIT

This API limits request frequencies to 18 times/3s for all accounts.

Parameters

Parameters	Type	Mandatory	Description
currency	String	Yes	currency
type	String	Yes	Account type, `TRADE_HF`(high-frequency trading account)

Return Value

Field	Description
currency	currency
balance	Total funds
available	Available funds
holds	Funds on hold
transferable	Transferrable funds

Account Ledger in high-frequency trading accounts

// response
{
    "code": "200000", 
    "data": [
        {
            "id": "42852417537", 
            "currency": "CSP", 
            "amount": "1.00000000", 
            "fee": "0.00000000", 
            "balance": "99999986.99999999", 
            "accountType": "TRADE_HF", 
            "bizType": "TRADE_EXCHANGE", 
            "direction": "in", 
            "createdAt": "1661347205743", 
            "context": "{'symbol':'CSP-USDT','orderId':'6306257dd9180300014c8d47','tradeId':'609522034689'}"
        }, 
        {
            "id": "42852401152", 
            "currency": "CSP", 
            "amount": "1.00000000", 
            "fee": "0.00000000", 
            "balance": "99999985.99999999", 
            "accountType": "TRADE_HF", 
            "bizType": "TRADE_EXCHANGE", 
            "direction": "out", 
            "createdAt": "1661347205743", 
            "context": "{'symbol':'CSP-USDT','orderId':'63062585d9180300014c8d50','tradeId':'609522034689'}"
        }
    ]
}

This API endpoint returns all transfer (in and out) records in high-frequency trading account and supports multi-coin queries. The query results are sorted in descending order by createdAt and id.

HTTP Request

GET /api/v1/hf/accounts/ledgers

Example

GET /api/v1/hf/accounts/ledgers?bizType=TRADE_EXCHANGE&currency=YOP,DAI&startAt=1601395200000

API Permissions

This API requires General permissions

REQUEST RATE LIMIT

This API limits request frequencies to 18 times/3s for all accounts.

Parameters

Parameters	Type	Mandatory	Description
currency	String	No	currency, optional，can select more than one，separate with commas，select no more than `10` currencys，the default will be to query for all currencys if left empty
direction	String	No	Direction of transaction (in or out): `in`-transfer in, `out`-transfer out
bizType	String	No	Transaction type: `TRANSFER`-transfer funds,`TRADE_EXCHANGE`-Trade
lastId	long	No	The id of the last set of data from the previous batch of data. By default, the latest information is given.
limit	int	No	Default`100`，Max`200`
startAt	long	No	Start time (ms), the conditional limit createdAt
endAt	long	No	End time (ms), the conditional limit createdAt

If lastId is configured, the information obtained < lastId. Otherwise, it will go back to the latest information. You can only obtain data from within a 3 * 24 hour time range (i.e., from 3 * 24 hours ago up to now) If you specify a time range that exceeds this limit, the system will default to data from within 3 * 24 hours.

Return Value

Field	Description
id	Unique key
currency	currency
amount	Change in funds balance
fee	Deposit or withdrawal fee
balance	Total balance of funds after change
accountType	Master account type `TRADE_HF`
bizType	Trnasaction type，such as `TRANSFER`, `TRADE_EXCHANGE`, etc.
direction	Direction of transfer( `out` or `in`)
createdAt	Created
context	Core transaction parameter

context description
- If the bizType is TRADE_EXCHANGE, the context field will include additional transaction information (order id, transaction id, and trading pair).

Trade

The following requires signature verification.

Order

Place hf order

// response
{
    "code": "200000",
    "data": {
        "orderId": "5bd6e9286d99522a52e458de"
    }
}

There are two types of orders: (limit) order: set price and quantity for the transaction. (market) order : set amount or quantity for the transaction.

Before placing an order, make sure there are enough funds in your high-frequency trading account. Once the order is successfully placed, the amount of funds required for the order will be frozen. The amount frozen will depend on the type of order placed as well as the request parameters set.

Please note that once your order enters the order book, the system will freeze the handling fees for the order ahead of time.

Before placing orders, please be sure to fully understand the meaning of the parameters for each trading pair.

For each account, the maximum number of ACTIVE orders is 200 for each trading pair.

HTTP Request

POST /api/v1/hf/orders

Example

POST /api/v1/hf/orders

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency for this API is limited to 150 times/3s for each account

Parameters

Public order placement request parameters

Parameters	Type	Mandatory	Description
clientOid	String	No	Client Order Id，unique identifier created by the user, the use of UUID is recommended
symbol	String	Yes	Trading pair, such as, `ETH-BTC`
type	String	Yes	Order type `limit` and `market`
side	String	Yes	`buy` or `sell`
stp	String	No	Self trade prevention (`self trade prevention`) is divided into four strategies: `CN`, `CO`, `CB` , and `DC`
tags	String	No	Order tag, cannot exceed `20` characters (ASCII) in length
remark	String	No	Order placement remarks, length cannot exceed `20` characters (ASCII) in length

Additional Request Parameters Required by `limit` Orders

Parameters	Type	Mandatory	Description
price	String	Yes	Specify price for currency
size	String	Yes	Specify quantity for currency
timeInForce	String	No	[Optional] Order timing strategy `GTC`, `GTT`, `IOC`, `FOK` (The default is `GTC`)
cancelAfter	long	No	[Optional] Cancel after `n` seconds，the order timing strategy is `GTT`
postOnly	boolean	No	[Optional] passive order labels, this is disabled when the order timing strategy is `IOC` or `FOK`
hidden	boolean	No	[Optional] Hidden or not (not shown in order book)
iceberg	boolean	No	[Optional] Whether or not only visible portions of orders are shown in iceberg orders
visibleSize	String	No	[Optional] Maximum visible quantity in iceberg orders

Additional request parameters required by `market` orders

When placing a market order, the size or funds must be set.

Parameters	Type	Mandatory	Description
size	String	No	(Select one out of two: `size` or `funds`)
funds	String	No	(Select one out of two: `size` or `funds`)

Terms

Trading pair (Symbol)

The trading pair must be a trading pair supported by KuCoin.

Client Order Id(clientOid)

The ClientOid field is a unique ID created by the user（we recommend using a UUID）, and can only contain numbers, letters, underscores （_）, and hyphens （-）. This field is returned when order information is obtained. You can use clientOid to tag your orders. ClientOid is different from the order ID created by the service provider. Please do not initiate requests using the same clientOid. The maximum length for the ClientOid is 40 characters.

Please remember the orderId created by the service provider, it used to check for updates in order status.

Order Type (type):

The type of order you specify when you place your order determines whether or not you need to request other parameters and also affects the execution of the matching engine.

When placing a limit order, you must specify a price and size. The system will try to match the order according to market price or a price better than market price. If the order cannot be immediately matched, it will stay in the order book until it is matched or the user cancels.

Unlike limit orders, the price for market orders fluctuates with market prices. When placing a market order, you do not need to specify a price, you only need to specify a quantity. Market orders are filled immediately and will not enter the order book. All market orders are takers and a taker fee will be charged.

Trade Type (tradeType)

The platform currently supports spot （TRADE） asset trading orders, the system will default to freezing funds in your trading account according to spot trading rules.

Price (Price)

When placing a limit order, the price must be based on price increments (priceIncrement) for the trading pair. The price increment (priceIncrement) is the price precision for the trading pair. For example, for the BTC-USDT trading pair, the priceIncrement is 0.00001000. So the price for your orders cannot be less than 0.00001000 and must be a multiple of priceIncrement. Otherwise, the order will return an invalid priceIncrement error.

Size (Size)

When placing a limit order, size refers to the amount of trading targets (the asset name written in front) for the trading pair. Size must be based on the baseIncrement. The baseIncrement represents the precision for the trading pair. The size of an order must be a positive-integer multiple of baseIncrement and must be between baseMinSize and baseMaxSize.

Funds (Funds)

When placing a market order, the funds field refers to the funds for the priced asset (the asset name written latter) of the trading pair. The funds must be based on the quoteIncrement of the trading pair. The quoteIncrement represents the precision of the trading pair. The funds value for an order must be a multiple of quoteIncrement and must be between quoteMinSize and quoteMaxSize.

Time In Force (TimeInForce)

Time in force is a special strategy used during trading. It is used to specify how long an order shall remain active before being executed or expiring. There are four types of TimeInForce:

Abbreviation	Full name	Description
GTC	Good Till Canceled	Expires only when cancelled
GTT	Good Till Time	Expires at a specified time
IOC	Immediate Or Cancel	Execute the portions that can be executed immediately and cancel the rest; this does not enter the order book.
FOK	Fill Or Kill	Cancel if the order cannot be completely filled.

Note: order fills include self-fills. Market order does not support the TimeInForce strategy

Post Only (PostOnly)

PostOnly is just a label. If an order can be immediately filled, then it is cancelled. When the user places a postOnly order, if the order encounters an iceberg order or hidden order after entering the matching engine, the order can be filled immediately. The postOnly order will charge maker fees and the iceberg order and hidden order will charge taker fees.

Hidden Orders and Iceberg Orders (Hidden & Iceberg)

Hidden orders and iceberg orders can be set in advanced settings (iceberg orders are a special type of hidden orders). When placing limit orders or stop limit orders, you can choose to execute according to hidden orders or iceberg orders.

Hidden orders are not shown in order books.

Unlike hidden orders, iceberg orders are divided into visible and hidden portions. When engaging in iceberg orders, visible order sizes must be set. The minimum visible size for an iceberg order is 1/20 of the total order size.

When matching, the visible portions of iceberg orders are matched first. Once the visible portions are fully matched, hidden portions will emerge. This will continue until the order is fully filled.

Note:

The system will charge taker fees for hidden orders and iceberg orders.
If you simultaneously set iceberg orders and hidden orders, your order will default to an iceberg order for execution.

Hold (Hold)

For limit price purchase orders, we will hold the amount of funds (price * size) required for your purchase order. Similarly, for limit price sell orders, we will also hold you sell order assets. When the transaction is executed, the service fees will be calculated. If you cancel a portion of a filled or unfilled order, then the remaining funds or amounts will be released and returned to your account. For market price buy/sell orders that require specific funds, we will hold the required funds in from your account. If only the size is specified, we may freeze (usually for a very short amount of time) all of the funds in your account prior to the order being filled or cancelled.

Self Trade Prevention (SelfTradePrevention)

Self trade prevention can be set in advanced settings, which will prevent self trades from occurring in your orders. If you do not set STP when placing an order, your order could be filled with another one of your orders. Market orders currently do not support DC strategies.

Market orders currently do not support DC. When timeInForce is FOK, stp will specify CN.

Abbreviation	Full name	Description
GTC	Good Till Canceled	Expires only when cancelled
GTT	Good Till Time	Expires at a specified time
IOC	Immediate Or Cancel	Execute the portions that can be executed immediately and cancel the rest; this does not enter the order book.
FOK	Fill Or Kill	Cancel if the order cannot be completely filled.

Abbreviation	Full name	Description
DC	Decrease and Cancel	Cancel the order with smaller size and change the order with larger size to the difference between old and new.
CO	Cancel old	Cancel the old order.
CN	Cancel new	Cancel the new order.
CB	Cancel both	Cancel both sides

Order Lifecycle (ORDER LIFECYCLE)

When an order placement request is successful (the matching engine receives the order) or denied (due to there being insufficient funds or illegal parameter values, etc.), the system will respond to the HTTP request. When an order is successfully placed, the order ID is returned. The order will be matched, which could result in it being fully or partially filled. When an order is fully or partially filled, the remaining portions of the order will be in an active state awaiting to be matched (this does not include IOC orders). Orders that are fully or partially filled(already cancelled) will be put into the “done” state.

Users that have subscribed to the Market Data Channel can use the order ID （orderId） and client ID （clientOid） to identify messages.

Price Protection Mechanisms

Price protection mechanisms ae enabled for order placements. Rules are detailed below:

If the spot trading market order/limit order placed by the user can be directly matched with an order in the current order book, the system will judge whether deviation between the price corresponding to the transaction depth and the spread exceeds the threshold value （the threshold value can be obtained using the symbol API endpoint）；
If it is exceeded, for limit orders, the order will be directly cancelled;
If it is a market order, then the system will partially execute the order. The execution limit will be the order size within the price range corresponding to the threshold value. The remaining orders will not be filled.

For example: if the threshold value is 10%, when a user places a market price purchase order in the KCS/USDT trading market for 10,000 USDT (the selling price is currently 1.20000), the system will determine that after the order is completely filled, the final price will be 1.40000. (1.40000-1.20000)/1.20000=16.7%>10%. The threshold value is 1.32000. The user’s market price purchase order will be filled only to a maximum of 1.32000. The remaining order portions will not be matched with orders in the order book. Note: this feature may not be able to determine depth with complete accuracy. If your order is not completely filled, it may be because the portion exceeding the threshold value was not filled.

Return Value

Field	Description
orderId	An order Id is returned once an order is successfully placed.

Sync place hf order

{
    "code": "200000", 
    "data": {
    "orderId": "6d539dc614db3",
    "orderTime": "1507725176595",//order time
    "originSize": "10.01", 
    "dealSize": "2.01",
    "remainSize": "8",
    "canceledSize": "0",
    "status": "open", //open: the order is active: the order has been completed
    "matchTime": "1507725176595" //begin match time
  }
}

The request parameters of this interface are the same as those of the "Place hf order" interface

The difference between this interface and "Place hf order" is that this interface will synchronously return the order information after the order matching is completed.

For higher latency requirements, please select the "Place hf order" interface. If there is a requirement for returning data integrity, please select this interface

HTTP Request

POST /api/v1/hf/orders/sync

Example

POST /api/v1/hf/orders/sync

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 45 times/3s for each account

Parameters

The request parameters of this interface are the same as those of the "Place hf order" interface

Return Value

Field	Description
orderId	An order Id is returned once an order is successfully placed.
orderTime	order time
originSize	original order size
originFunds	Order original funds - market order
dealSize	deal size
dealFunds	deal funds - market order
remainSize	remain size
remainFunds	remain funds - market order
canceledSize	Cumulative number of cancellations
canceledFunds	Cumulative funds of cancellations - market order
status	Order Status. open：order is active; done：order has been completed
matchTime	matching time

Place multiple hf orders

//request
{
  "orderList": [
      {
          "clientOid": "3d07008668054da6b3cb12e432c2b13a",
          "side": "buy",
          "type": "limit",
          "price": "0.01",
          "size": "1",
          "symbol": "ETH-USDT"
      },
      {
          "clientOid": "37245dbe6e134b5c97732bfb36cd4a9d",
          "side": "buy",
          "type": "limit",
          "price": "0.01",
          "size": "1",
          "symbol": "ETH-USDT"
      }
  ]
}

//response
{
  "success": true,
  "code": "200",
  "msg": "success",
  "retry": false,
  "data": [
      {
          "orderId": "641d669c9ca34800017a2a3c",
          "success": true
      },
      {
          "orderId": "641d669c9ca34800017a2a45",
          "success": true
      }
  ]
}

This endpoint supports sequential batch order placement from a single endpoint. A maximum of 5orders can be placed simultaneously. The order types must be limit orders of the same trading pair （this endpoint currently only supports spot trading and does not support margin trading）.

This endpoint only supports order placement requests. To obtain the results of the order placement, you will need to check the order status or subscribe to websocket to obtain information about he order.

HTTP Request

POST /api/v1/hf/orders/multi

Example

POST /api/v1/hf/orders/multi

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API endpoint is limited to 3 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
clientOid	String	No	Client Order Id，a unique identifier created by the user，the use of UUID is recommended
symbol	String	Yes	trading pairs such as，ETH-BTC
type	String	Yes	Order type limit and market
timeInForce	String	No	[Optional] Time in force `GTC`, `GTT`, `IOC`, `FOK` (defaults to `GTC`)
stp	String	No	[Optional] Self trade prevention（self trade prevention）is divided into `CN`, `CO`, `CB` , and `DC` strategies
side	String	Yes	buy（buy） or sell（sell）
price	String	Yes	Specify price for currency
size	String	Yes	Specify quantity of currency
cancelAfter	long	No	[Optional] Cancels in `n` seconds, with `GTT` as the time in force strategy
postOnly	boolean	No	[Optional] Post only identifier, invalid when the time in force strategy is `IOC` or `FOK`
hidden	boolean	No	[Optional] Hidden or not（not shown in order book）
iceberg	boolean	No	[Optional] Whether iceberg orders only show visible portions of orders
visibleSize	String	No	[Optional] The maximum visible size for iceberg orders
tags	String	No	[Optional] The order identifier length cannot exceed `20` characters（ASCII）
remark	String	No	[Optional] Order placement remarks cannot exceed a length of `20` characters（ASCII）

Return Value

Field	Description
status	Order creation results (`success`, `fail`)
Msg	Reason of failure

Sync place multiple hf orders

//request
{
  "orderList": [
      {
          "clientOid": "3d07008668054da6b3cb12e432c2b13a",
          "side": "buy",
          "type": "limit",
          "price": "0.01",
          "size": "1",
          "symbol": "ETH-USDT"
      },
      {
          "clientOid": "37245dbe6e134b5c97732bfb36cd4a9d",
          "side": "buy",
          "type": "limit",
          "price": "0.01",
          "size": "1",
          "symbol": "ETH-USDT"
      }
  ]
}

//response
 {
  "success": true,
  "code": "200",
  "msg": "success",
  "retry": false,
  "data": [
      {
          "orderId": "641d67ea162d47000160bfb8",
          "orderTime": 1679648746796,
          "originSize": "1",
          "dealSize": "0",
          "remainSize": "1",
          "canceledSize": "0",
          "status": "open",
          "matchTime": 1679648746443,
          "success": true
      },
      {
          "orderId": "641d67eb162d47000160bfc0",
          "orderTime": 1679648747369,
          "originSize": "1",
          "dealSize": "0",
          "remainSize": "1",
          "canceledSize": "0",
          "status": "open",
          "matchTime": 1679648746644,
          "success": true
      }
  ]
}

The request parameters of this interface are the same as those of the "Sync place multiple hf orders" interface

The difference between this interface and "Sync place multiple hf orders" is that this interface will synchronously return the order information after the order matching is completed.

For higher latency requirements, please select the "Sync place multiple hf orders" interface. If there is a requirement for returning data integrity, please select this interface

HTTP Request

POST /api/v1/hf/orders/multi/sync

Example

POST /api/v1/hf/orders/multi/sync

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API endpoint is limited to 3 times/3s for each account

Parameters

The request parameters of this interface are the same as those of the "Sync place multiple hf orders" interface, Maximum support for 20 orders

Return Value

Field	Description
orderId	order Id is returned once an order is successfully placed.
orderTime	order time
originSize	original order size
dealSize	deal size
remainSize	remain size
canceledSize	Cumulative number of cancellations
status	Order Status. open：order is active; done：order has been completed
matchTime	matching time
success	Whether the order was placed successfully.

Modify order

This interface can modify the price and quantity of the order according to orderId or clientOid.

The implementation of this interface is: cancel the order and place a new order on the same trading pair, and return the modification result to the client synchronously

When the quantity of the new order updated by the user is less than the filled quantity of this order, the order will be considered as completed, and the order will be cancelled, and no new order will be placed

HTTP Request

POST /api/v1/hf/orders/alter

Example

POST /api/v1/hf/orders/alter

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API endpoint is limited to 60 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
symbol	String	Yes	symbol
clientOid	String	No	clientOid
orderId	String	No	other id
newPrice	String	No	The modified price of the new order
newSize	String	No	The modified size of the new order

orderId and clientOid must choose one

newPrice and newSize must choose one

Return Value

Field	Description
newOrderId	The order id of the new order

//response
{
    "code": "200000", 
    "data": {
    "newOrderId": "6d539dc614db3"
  }
}

Cancel orders by orderId

// response
{   
    "code": "200000", 
    "data": {
        "orderId": "630625dbd9180300014c8d52"
    }
}

This endpoint can be used to cancel a high-frequency order by orderId.

HTTP Request

DELETE /api/v1/hf/orders/{orderId}?symbol={symbol}

Example

DELETE /api/v1/hf/orders/5bd6e9286d99522a52e458de?symbol=ETH-BTC

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 150 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
orderId	String	Yes	Path parameter，Order Id unique identifier
symbol	String	Yes	Trading pair, such as `ETH-BTC`

If an order cannot be cancelled （if it has already been filled or cancelled），an error message will be returned, and you can judge what the reason was based on the returned msg.

Return Value

Field	Description
orderId	Order id of the cancelled order

Sync cancel orders by orderId

The request parameters of this interface are the same as those of the "Cancel orders by orderId" interface

The difference between this interface and "Cancel orders by orderId" is that this interface will synchronously return the order information after the order canceling is completed.

For higher latency requirements, please select the "Cancel orders by orderId" interface. If there is a requirement for returning data integrity, please select this interface

HTTP Request

DELETE /api/v1/hf/orders/sync/{orderId}

Example

DELETE /api/v1/hf/orders/sync/{orderId}

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API endpoint is limited to 150 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
orderId	String	Yes	Path parameter，Order Id unique identifier
symbol	String	Yes	Trading pair, such as `ETH-BTC`

Return Value

Field	Description
orderId	order Id
originSize	original order size
originFunds	Order original funds - market order
dealSize	deal size
remainSize	remain size
canceledSize	Cumulative number of cancellations
status	Order Status. open：order is active; done：order has been completed

//response
 {
    "orderId": "641d67ea162d47000160bfb8",
    "originSize": "1",
    "dealSize": "0",
    "remainSize": "1",
    "canceledSize": "0",
    "status": "done"
}

Cancel order by clientOid

// response
{
    "code": "200000", 
    "data": {
        "clientOid": "6d539dc614db3"
    }
}

This endpoint sends out a request to cancel a high-frequency order using clientOid.

HTTP Request

DELETE /api/v1/hf/orders/client-order/{clientOid}?symbol={symbol}

Example

DELETE /api/v1/hf/orders/client-order/6d539dc614db3?symbol=ETH-BTC

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 150 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
clientOid	String	Yes	Path parameter，an identifier created by the
symbol	String	Yes	Trading pair such as `ETH-BTC`

Return Value

Field	Description
clientOid	Identifier created by the client

Sync cancel orders by clientOid

The request parameters of this interface are the same as those of the "Cancellation of order by clientOid" interface

The difference between this interface and "Cancellation of order by clientOid" is that this interface will synchronously return the order information after the order canceling is completed.

For higher latency requirements, please select the "Cancellation of order by clientOid" interface. If there is a requirement for returning data integrity, please select this interface

HTTP Request

DELETE /api/v1/hf/orders/sync/client-order/{clientOid}

Example

DELETE /api/v1/hf/orders/sync/client-order/{clientOid}

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API endpoint is limited to 150 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
clientOid	String	Yes	Path parameter，an identifier created by the
symbol	String	Yes	Trading pair such as `ETH-BTC`

Return Value

Field	Description
orderId	order Id
originSize	original order size
originFunds	Order original funds - market order
dealSize	deal size
remainSize	remain size
canceledSize	Cumulative number of cancellations
status	Order Status. open：order is active; done：order has been completed

//response
 {
    "orderId": "641d67ea162d47000160bfb8",
    "originSize": "1",
    "dealSize": "0",
    "remainSize": "1",
    "canceledSize": "0",
    "status": "done"
}

Cancel specified number of orders by orderId

{
    "code": "200000", 
    "data": {
    "orderId": "6d539dc614db3",
    "cancelSize": "10.01"
  }
}

This interface can cancel the specified quantity of the order according to the orderId.

HTTP Request

DELETE /api/v1/hf/orders/cancel/{orderId}

Example

DELETE /api/v1/hf/orders/cancel/1?symbol=BTC-USDT&cancelSize=10.01

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 60 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
orderId	String	Yes	Order id of the cancelled order
symbol	String	Yes	symbol
cancelSize	String	Yes	canceled size

Return Value

Field	Description
orderId	Canceled orderId
cancelSize	canceled size

Cancel all HF orders by symbol

// response
{
    "code": "200000", 
    "data": "success"
}

This endpoint allows cancellation of all orders related to a specific trading pair with a status of open (including all orders pertaining to high-frequency trading accounts and non-high-frequency trading accounts). If the HTTP status of the interface is 200, it can be considered that the cancellation request has been submitted successfully.

This endpoint only sends cancellation requests. The results of the requests must be obtained by checking the order status or subscribing to websocket.

HTTP Request

DELETE /api/v1/hf/orders?symbol={symbol}

Example

DELETE /api/v1/hf/orders?symbol=ETH-BTC

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API endpoint is limited to 3 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
symbol	String	Yes	Cancel open orders pertaining to the specified trading pair

Return Value

Since this interface is a batch cancellation, the http status of the interface is 200, which means that the cancellation request has been submitted successfully, so no return value is required. The actual cancellation result can be obtained by query order status through API or subscribing to websocket to get the order status.

Obtain List of Active HF Orders

// response
{
    "code" : "200000",
    "data" : [
        "id": "5c35c02703aa673ceec2a168",
        "symbol": "BTC-USDT",
        "opType": "DEAL",
        "type": "limit",
        "side": "buy",
        "price": "10",
        "size": "2",
        "funds": "0",
        "dealFunds": "0.166",
        "dealSize": "2",
        "fee": "0",
        "feeCurrency": "USDT",
        "stp": "",
        "timeInForce": "GTC",
        "postOnly": false,
        "hidden": false,
        "iceberg": false,
        "visibleSize": "0",
        "cancelAfter": 0,
        "channel": "IOS",
        "clientOid": "",
        "remark": "",
        "tags": "",
        "active": true,
        "inOrderBook": true,
        "cancelExist": false,
        "createdAt": 1547026471000,
        "lastUpdatedAt": 1547026471001,
        "tradeType": "TRADE",
        "cancelledSize": "0",
        "cancelledFunds": "0",
        "remainSize": "0",
        "remainFunds": "0"
        }        
    ]
}

This endpoint obtains a list of all active HF orders. The return data is sorted in descending order based on the latest update times.

HTTP Request

GET /api/v1/hf/orders/active

Example

GET /api/v1/hf/orders/active?symbol=BTC-ETH

API Permissions

This API requires General permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 30 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
symbol	String	Yes	Only returns order information for the specified trading pair

Return Value

Field	Description
id	Order id，a unique identifier pertaining to the order
symbol	Trading pair
opType	Operation type: DEAL
type	Order type
side	Buy or sell
price	Order price
size	Order size
dealSize	Number of filled transactions
cancelledSize	Number of canceled transactions
remainSize	Number of remain transactions
funds	Order amount
dealFunds	Number of filled funds
cancelledFunds	Number of canceled funds
remainFunds	Number of remain funds
fee	Service fee
feeCurrency	currency used to calculate fees
stp	Self trade protection
timeInForce	Time in force
postOnly	Is it post only?
hidden	Is it a hidden order?
iceberg	Is it an iceberg order?
visibleSize	Visible size of iceberg order in order book.
cancelAfter	A GTT timeInForce that expires in n seconds
channel	Source of orders
clientOid	Identifier created by the client
remark	Order description
tags	Order identifier
active	Order status: `true`-The status of the order is`active`; `false`-The status of the order is`done`
inOrderBook	Whether to enter the orderbook: `true`: enter the orderbook; `false`: not enter the orderbook
cancelExist	Are there any cancellation records pertaining to the order?
createdAt	order creation time
lastUpdatedAt	Last update time of order
tradeType	Trade type: TRADE (Spot Trading)

Order Polling (Polling)

For high-frequency trading users, we recommend locally caching, maintaining your own order records, and using market data streams to update your order information in real time.

Obtain List of symbol with active HF orders

This interface can query all trading pairs that the user has active orders

HTTP Request

GET /api/v1/hf/orders/active/symbols

Example

GET /api/v1/hf/orders/active/symbols

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API endpoint is limited to 3 times/3s for each account

Parameters

N/A

Return Value

Field	Description
symbols	List of trading pairs with active orders

//response
{

    "success": true,
    "code": "200",
    "msg": "success",
    "retry": false,
    "data": {
        "symbols": ["BTC-USDT"]
    }

}

Obtain List of Filled HF Orders

// response
{
   "code":"200000",
   "data":{
      "lastId":2682265600,
      "items":[
         {
            "id":"63074a5a27ecbe0001e1f3ba",
            "symbol":"CSP-USDT",
            "opType":"DEAL",
            "type":"limit",
            "side":"sell",
            "price":"0.1",
            "size":"0.1",
            "funds":"0.01",
            "dealSize":"0",
            "dealFunds":"0",
            "fee":"0",
            "feeCurrency":"USDT",
            "stp":"",
            "timeInForce":"GTC",
            "postOnly":false,
            "hidden":false,
            "iceberg":false,
            "visibleSize":"0",
            "cancelAfter":0,
            "channel":"API",
            "clientOid":"",
            "remark":"",
            "tags":"",
            "cancelExist":true,
            "createdAt":1661422170924,
            "lastUpdatedAt":1661422196926,
            "tradeType":"TRADE",
            "inOrderBook":false,
            "active":false,
            "cancelledSize": "0",
            "cancelledFunds": "0",
            "remainSize": "0",
            "remainFunds": "0"
         }
      ]
   }
}

This endpoint obtains a list of filled HF orders and returns paginated data. The returned data is sorted in descending order based on the latest order update times.

HTTP Request

GET /api/v1/hf/orders/done

Example

GET /api/v1/hf/orders/done?symbol=BTC-ETH&type=limit&side=buy

API Permissions

This API requires General permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 30 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
symbol	String	Yes	Only returns order information for the specified trading pair
side	String	No	`buy` (Buy) or`sell` (Sell)
type	String	No	Order type: `limit` (limit order), `market`(market order)
startAt	long	No	Start time (ms)，last update(filled) time of the limit order
endAt	long	No	End time (ms)，last update(filled) time of limit order
lastId	long	No	The id of the last data item from the previous batch，defaults to obtaining the latest data
limit	int	No	Default`20`，maximum`100`

You can only obtain data from within a 3 * 24 hour time range（i.e., from now up to 3 * 24 hours ago）. If the time range limit is exceeded, the system will default to looking up data from within the 3 * 24 hour time range.

lastIdis used to filter data and paginate. If lastIdis not entered, the default is a maximum of 100 returned data items. The return results includelastId，which can be used as a query parameter to look up new data from the next page.

Return Value

Field	Description
id	Order id，a unique identifier of the order
symbol	Trading pair
opType	Operation type: DEAL
type	Order type
side	Buy or sell
price	Order price
size	Order size
dealSize	Number of filled transactions
cancelledSize	Number of canceled transactions
remainSize	Number of remain transactions
funds	Order amount
dealFunds	Number of filled funds
cancelledFunds	Number of canceled funds
remainFunds	Number of remain funds
fee	Service fee
feeCurrency	currency used to calculate fees
stp	Self trade protection
timeInForce	Time in force
postOnly	Is it post only?
hidden	Is it a hidden order?
iceberg	Is it an iceberg order?
visibleSize	Visible size of iceberg order in order book.
cancelAfter	A GTT timeInForce that expires in n seconds
channel	Source of orders
clientOid	Identifier created by the client
remark	Order description
tags	Order identifier
active	Order status: `true`-The status of the order is`active`; `false`-The status of the order is`done`
inOrderBook	Whether to enter the orderbook: `true`: enter the orderbook; `false`: not enter the orderbook
cancelExist	Are there any cancellation records pertaining to the order?
createdAt	order creation time
lastUpdatedAt	Last update time of order
tradeType	Trade type: TRADE (Spot Trading)

Details of a Single HF Order

// response
{
   "code":"200000",
   "data": {
        "id": "5f3113a1c9b6d539dc614dc6",
        "symbol": "KCS-BTC",
        "opType": "DEAL",
        "type": "limit",
        "side": "buy",
        "price": "0.00001",
        "size": "1",
        "funds": "0",
        "dealFunds": "0",
        "dealSize": "0",
        "fee": "0",
        "feeCurrency": "BTC",
        "stp": "",
        "timeInForce": "GTC",
        "postOnly": false,
        "hidden": false,
        "iceberg": false,
        "visibleSize": "0",
        "cancelAfter": 0,
        "channel": "API",
        "clientOid": "6d539dc614db312",
        "remark": "",
        "tags": "",
        "active": true,
        "inOrderBook": false,
        "cancelExist": false,
        "createdAt": 1547026471000,
        "lastUpdatedAt": 1547026471001,
        "tradeType": "TRADE",
        "cancelledSize": "0",
        "cancelledFunds": "0",
        "remainSize": "0",
        "remainFunds": "0"
    }
}

This endpoint can be used to obtain information for a single HF order using the order id.

HTTP Request

GET /api/v1/hf/orders/{orderId}?symbol={symbol}

Example

GET /api/v1/hf/orders/5c35c02703aa673ceec2a168?symbol=ETH-BTC

API Permissions

This API requires General permissions

Parameters

Parameters	Type	Mandatory	Description
orderId	String	Yes	Path parameter，Order Id unique identifier
symbol	String	Yes	Trading pair, such as `ETH-BTC`

If the order is not an active order, you can only get data within the time frame of 3 * 24 hours (ie: from the current time to 3 * 24 hours ago)

Return Value

Field	Description
id	Order id，a unique identifier of the order
symbol	Trading pair
opType	Operation type: DEAL
type	Order type
side	Buy or sell
price	Order price
size	Order size
dealSize	Number of filled transactions
cancelledSize	Number of canceled transactions
remainSize	Number of remain transactions
funds	Order amount
dealFunds	Number of filled funds
cancelledFunds	Number of canceled funds
remainFunds	Number of remain funds
fee	Service fee
feeCurrency	currency used to calculate fees
stp	Self trade protection
timeInForce	Time in force
postOnly	Is it post only?
hidden	Is it a hidden order?
iceberg	Is it an iceberg order?
visibleSize	Visible size of iceberg order in order book.
cancelAfter	A GTT timeInForce that expires in `n` seconds
channel	Source of orders
clientOid	Identifier created by the client
remark	Order description
tags	Order identifier
active	Order status: `true`-The status of the order is`active`; `false`-The status of the order is`done`
inOrderBook	Whether to enter the orderbook: `true`: enter the orderbook; `false`: not enter the orderbook
cancelExist	Are there any cancellation records pertaining to the order?
createdAt	order creation time
lastUpdatedAt	Last update time of order
tradeType	Trade type: TRADE (Spot Trading)

Obtain details of a single HF order using clientOid

// response
{
   "code":"200000",
   "data": {
        "id": "5f3113a1c9b6d539dc614dc6",
        "symbol": "KCS-BTC",
        "opType": "DEAL",
        "type": "limit",
        "side": "buy",
        "price": "0.00001",
        "size": "1",
        "funds": "0",
        "dealFunds": "0",
        "dealSize": "0",
        "fee": "0",
        "feeCurrency": "BTC",
        "stp": "",
        "timeInForce": "GTC",
        "postOnly": false,
        "hidden": false,
        "iceberg": false,
        "visibleSize": "0",
        "cancelAfter": 0,
        "channel": "API",
        "clientOid": "6d539dc614db312",
        "remark": "",
        "tags": "",
        "active": true,
        "inOrderBook": false,
        "cancelExist": false,
        "createdAt": 1547026471000,
        "lastUpdatedAt": 1547026471001,
        "tradeType": "TRADE",
        "cancelledSize": "0",
        "cancelledFunds": "0",
        "remainSize": "0",
        "remainFunds": "0"
    }
}

The endpoint can be used to obtain information about a single order using clientOid. If the order does not exist, then there will be a prompt saying that the order does not exist.

HTTP Request

GET /api/v1/hf/orders/client-order/{clientOid}?symbol={symbol}

Example

GET /api/v1/hf/orders/client-order/6d539dc614db312?symbol=ETH-BTC

API Permissions

This API requires General permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 30 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
clientOid	String	Yes	Path parameter，an identifier created by the client
symbol	String	Yes	Trading pair such as `ETH-BTC`

If the order is not an active order, you can only get data within the time frame of 3 * 24 hours (ie: from the current time to 3 * 24 hours ago)

Return Value

Field	Description
id	Order id，a unique identifier of the order
symbol	Trading pair
opType	Operation type: DEAL
type	Order type
side	Buy or sell
price	Order price
size	Order size
dealSize	Number of filled transactions
cancelledSize	Number of canceled transactions
remainSize	Number of remain transactions
funds	Order amount
dealFunds	Number of filled funds
cancelledFunds	Number of canceled funds
remainFunds	Number of remain funds
fee	Service fee
feeCurrency	currency used to calculate fees
stp	Self trade protection
timeInForce	Time in force
postOnly	Is it post only?
hidden	Is it a hidden order?
iceberg	Is it an iceberg order?
visibleSize	Visible size of iceberg order in order book.
cancelAfter	A GTT timeInForce that expires in `n` seconds
channel	Source of orders
clientOid	Identifier created by the client
remark	Order description
tags	Order identifier
active	Order status: `true`-The status of the order is`active`; `false`-The status of the order is`done`
inOrderBook	Whether to enter the orderbook: `true`: enter the orderbook; `false`: not enter the orderbook
cancelExist	Are there any cancellation records pertaining to the order?
createdAt	order creation time
lastUpdatedAt	Last update time of order
tradeType	Trade type: TRADE (Spot Trading)

HF auto cancel setting

// response
{
    "code": "200000", 
    "data": {
    "currentTime": 1682010526,
    "triggerTime": 1682010531 
  }
}

Call this interface to automatically cancel all orders of the set trading pair after the specified time. If this interface is not called again for renewal or cancellation before the set time, the system will help the user to cancel the order of the corresponding trading pair. Otherwise it will not.

Note: The order cancellation delay is between 0 and 10 seconds, and the order will not be canceled in real time. When the system cancels the order, if the transaction pair status is no longer operable to cancel the order, it will not cancel the order

HTTP Request

POST /api/v1/hf/orders/dead-cancel-all

Example

POST /api/v1/hf/orders/dead-cancel-all

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 1 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
timeout	Integer	Yes	Auto cancel order trigger setting time, the unit is second. range: timeout=-1 (meaning unset) or 5 <= timeout <= 86400. For example, timeout=5 means that the order will be automatically canceled if no user request is received for more than 5 seconds. When this parameter is changed, the previous setting will be overwritten.
symbols	String	No	List of trading pairs. When this parameter is not empty, separate it with commas and support up to 50 trading pairs. Empty means all trading pairs. When this parameter is changed, the previous setting will be overwritten.

Return Value

Field	Description
currentTime	System current time (in seconds)
triggerTime	Trigger cancellation time (in seconds)

HF auto cancel order setting query

// response
 {
    "timeout": 5,
    "symbols": "BTC-USDT",
    "currentTime": 1682010526,
    "triggerTime": 1682010531
}

Through this interface, you can query the settings of automatic order cancellation

HTTP Request

GET /api/v1/hf/orders/dead-cancel-all/query

Example

GET /api/v1/hf/orders/dead-cancel-all/query

API Permissions

This API requires Trade permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 1 times/3s for each account

Parameters

N/A

Return Value

Field	Description
timeout	Auto cancel order trigger setting time, the unit is second. range: timeout=-1 (meaning unset) or 5 <= timeout <= 86400
symbols	List of trading pairs. Separated by commas, empty means all trading pairs
currentTime	System current time (in seconds)）
triggerTime	Trigger cancellation time (in seconds)

Transaction details

HF transaction records

// response
{
   "code":"200000",
   "data":{
      "items":[
         {
            "id":2678765568,
            "symbol":"BTC-ETC",
            "tradeId":616179312641,
            "orderId":"6306cf6e27ecbe0001e1e03a",
            "counterOrderId":"6306cf4027ecbe0001e1df4d",
            "side":"buy",
            "liquidity":"taker",
            "forceTaker":false,
            "price":"1",
            "size":"1",
            "funds":"1",
            "fee":"0.00021",
            "feeRate":"0.00021",
            "feeCurrency":"USDT",
            "stop":"",
            "tradeType":"TRADE",
            "type":"limit",
            "createdAt":1661390702919
         }
      ],
      "lastId":2678765568
   }
}

This endpoint can be used to obtain a list of the latest HF transaction details. The returned results are paginated. The data is sorted in descending order according to time.

HTTP Request

GET /api/v1/hf/fills

Example

GET /api/v1/hf/fills?symbol=BTC-USDT

API Permissions

This API requires General permissions

REQUEST RATE LIMIT

The request frequency of this API is limited to 9 times/3s for each account

Parameters

Parameters	Type	Mandatory	Description
orderId	String	No	Look up the transaction details pertaining to the order id（If`orderId` is specified，please ignore the other query parameters）
symbol	String	Yes	Only returns order information for the specified trading pair
side	String	No	`buy`（Buy） or `sell`（Sell）
type	String	No	Order type: `limit`（limit order）, `market`(market order)
startAt	long	No	Start time（ms），puts a restriction on the transaction(creation) time for the transaction records
endAt	long	No	End time（ms），puts a restriction on the transaction(creation) time of the transaction records
lastId	long	No	The id of the last data item from the previous batch, defaults to obtaining the latest data
limit	int	No	Default`100`，maximum `200`

Return Value

Field	Description
id	Id of transaction detail
symbol	Trading pair
tradeId	Trade Id
orderId	Order Id
counterOrderId	Counterparty order Id
side	Buy or sell
liquidity	Liquidity type: taker or maker
forceTaker	Whether or not to forcefully process as taker
price	Order price
size	Order size
funds	Turnover
fee	Service fee
feeRate	Fee rate
feeCurrency	currency used to calculate fees
type	Order type: limit or market
stop	Take Profit and Stop Loss type, currently HFT does not support the Take Profit and Stop Loss type, so it is empty
createdAt	Transaction(Creation) time
tradeType	Trade type: `TRADE`(Spot Trading)

Show time range

Settlement

Settlement is divided into two parts: transaction settlement and fee settlement. When matching is complete, the data is immediately updated into our data storage and the system initiates the settlement to deduct funds from the funds that are on hold.

Handling fees

Orders on the KuCoin platform are divided into two types: Taker and Maker. Taker orders can be filled with existing orders in the order book. On the contrary, Maker orders will stay in the order book and await matching. Taker orders decrease market liquidity and therefore charge a taker fee. Maker orders increase market liquidity and therefore only charge a lower handling fee or may even pay out rewards. Note: market orders, iceberg orders, and hidden orders all charge taker fees.

When an order is placed, the system puts a hold on a portion of the funds in your account for paying the taker fee. Parameter values in the liquidity field determine whether taker fees or maker fees will be charged for the order.

If your order is a limit order, when the order is placed it will immediately be matched in the matching engine and we will charge a taker fee. If your order is not immediately matched or is only partially matched, the remaining portions will enter the order book. Maker fees will be charged for orders that have entered the order book before they are cancelled or filled.

After entering the matching stage, matching will be conducted with counterparty orders. When the remaining amount for the order is 0，the transaction is complete. If the remaining funds are not enough to purchase the minimum amount（0.00000001）, the order is cancelled.

If your order is filled as a maker, we will refund the remaining amount of withheld taker fees.

Please note:

When you create a hidden/iceberg order, even if it is not immediately matched by the matching engine and is filled as post only, a taker fee will still be charged.
Maker fees will be charged for post only orders. If the order is immediately matched with existing orders (with the exception of iceberg/hidden orders) on the market after order placement, then the order will be cancelled. If a post only order is immediately filled with iceberg/hidden orders, a maker fee will be charged for the post only order.

For Example:

Using BTC/USDT as an example, if you want to 1BTC at market price，the handling fee would be 0.1%，with the market order book data as follows：

Price（USDT）	Size（BTC）	Side
4200.00	0.18412309	sell
4015.60	0.56849308	sell
4011.32	0.24738383	sell
3995.64	0.84738383	buy
3988.60	0.20484000	buy
3983.85	1.37584908	buy

When you place a buy market order, it will be filled immediately, and the transaction detailed will show 3 transactions, as shown below:

Price（USDT）	Size（BTC）	Fee（BTC）
4011.32	0.24738383	0.00024738
4015.60	0.56849308	0.00056849
4200.00	0.18312409	0.00018312

Websocket

While there is a strict access frequency control for REST API, we highly recommend that API users utilize Websocket to get the real-time data. For Websocket related settings, please refer to the documentation https://docs.kucoin.com/#websocket-feed

Public Channels

please refer to the documentation https://docs.kucoin.com/#public-channels

Private Channels

HF Account Balance Notice

Topic: /account/balance

Push frequency: real-time

You will receive this message when an HF account balance changes. The message contains the details of the change.

Relation Event

類型	描述
trade_hf.hold	Hold (high frequency account)
trade_hf.setted	Settlement (high frequency account)
trade_hf.transfer	Transfer (high frequency account)
trade_hf.other	Other operations (high frequency account)

Private HF Order Change Events

please refer to the documentation https://docs.kucoin.com/#private-order-change-events or https://docs.kucoin.com/#private-order-change-v2

Other

Other parts please refer to the documentation https://docs.kucoin.com/#private-channels

Quick Start

Brief Introduction

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User

Account

Internal Funds Transfers in high-frequency trading accounts

HTTP Request

Example

API Permissions

Parameters

Return Value

List high-frequency trading accounts

HTTP Request

Example

API Permissions

Parameters

Return Value

Detail of the high-frequency trading account

HTTP Request

Example

API Permissions

Parameters

Return Value

Get Transferrable Funds in high-frequency trading accounts

HTTP Request

Example

API Permissions

REQUEST RATE LIMIT

Parameters

Return Value

Account Ledger in high-frequency trading accounts

HTTP Request

Example

API Permissions

REQUEST RATE LIMIT

Parameters

Return Value

Trade

Order

Place hf order

HTTP Request

Example

API Permissions

REQUEST RATE LIMIT

Parameters

Additional Request Parameters Required by limit Orders

Additional request parameters required by market orders

Terms

Trading pair (Symbol)

Client Order Id(clientOid)

Order Type (type):

Trade Type (tradeType)

Price (Price)

Size (Size)

Funds (Funds)

Time In Force (TimeInForce)

Post Only (PostOnly)

Hidden Orders and Iceberg Orders (Hidden & Iceberg)

Note:

Hold (Hold)

Self Trade Prevention (SelfTradePrevention)

Order Lifecycle (ORDER LIFECYCLE)

Price Protection Mechanisms

Return Value

Sync place hf order

HTTP Request

Example

API Permissions

REQUEST RATE LIMIT

Parameters

Return Value

Place multiple hf orders

HTTP Request

Example

API Permissions

REQUEST RATE LIMIT

Parameters

Return Value

Sync place multiple hf orders

HTTP Request

Additional Request Parameters Required by `limit` Orders

Additional request parameters required by `market` orders