Mayex Public API

General public API

Mayex provides HTTP Rest API for clients to operate orders, all endpoints base JSON object.
The default Rest API base endpoint is: https://www.mayex.com/api/user/v1/ and https://www.mayex.com/api/order/v1/.
Mayex provides WebSocket API for clients to receive market data, order and position updates. The WebSocket API url is: Spot: wss://www.mayex.com/spot-ws/. Contract: wss://www.mayex.com/ws/.

REST API Standards

Restful API Response

HTTP Return Codes

HTTP 401 return code when unauthenticated
HTTP 403 return code when lack of privilege.
HTTP 429 return code when breaking a request rate limit.
HTTP 5XX return codes for Mayex internal errors. Note: This doesn't mean the operation failed, the execution status is UNKNOWN and could be Succeeded.

Rest Response format

All restful API shares the same response format.

{
    "status": <code>,
    "error": <msg>,
    "data": <data>
}

Field	Description
code	0 means `success`, non-zero means `error`
error	when code is non-zero, it provides short error description
data	operation dependent

Common constants

order type

order type	description
LIMIT	limit order
MARKET	market order
STOP_LOSS_MARKET	stop loss at market price
STOP_LOSS_LIMIT	stop loss at limit price
TAKE_PROFIT_LIMIT	take profit at limit price
TAKE_PROFIT_MARKET	take profit at market price
CONDITIONAL_LIMIT	conditional limit order
CONDITIONAL_MARKET	conditional market order

order Status

order status	description
NEW	order accepted
PARTIALLY_FILLED	order partial filled
FILLED	order fully filled
CANCELED	order canceled
EXPIRED	Order expired

TimeInForce

timeInForce	description
GTC	good till cancel
POST_ONLY	post only
IOC	immediate or cancel
FOK	fill or kill

Price Trigger type

trigger	description
MARK_PRICE	trigger by mark price
LAST_PRICE	trigger by last price

Query Product Information

Request：

GET https://www.mayex.com/user/v1/public/spot-marketing/all-pair

Trade API List

Place Order

HTTP Request:

POST /order/v1/private/orders/place-order

{
  "quantity": "0.01",
  "price": "42601.5",
  "side": "BUY",
  "positionSide": "LONG",
  "isolated": true,
  "type": "LIMIT",
  "timeInForce": "GTC",
  "symbol": "btcusdt",
  "clientOrderId": "WEB9C6IB7h8absN",
  "orderRespType": "ACK"
}

Field	Type	Required	Description	Possible values
symbol	String	Yes	Which symbol to place order
clientOrderId	String	Yes	client order id, max length is 40
side	Enum	Yes	Order direction, Buy or Sell	BUY, SELL
positionSide	Enum	Yes	position direction	LONG, SHORT
isolated	Boolean	Yes	true for isolated position, false for cross position	true, false
closePosition	Boolean	No	indicate close position order or not	true, false
quantity	String	Yes	Order quantity
price	String	-	price, required for limit order
type	Enum	-		refer to orderType
timeInForce	Enum	-	Time in force.	GTC, FOK, IOC, POST_ONLY
conditional	Boolean	-	indicate a conditional order
triggerType	Enum	-		LAST_PRICE, Mark_PRICE
triggerPrice	String	-	Trigger Price
tpTriggerType	String	-	take profit trigger type	LAST_PRICE, Mark_PRICE
tpTriggerPrice	String	-	take profit trigger price
slTriggerType	String	-	stop loss trigger type	LAST_PRICE, Mark_PRICE
slTriggerPrice	String	-	stop loss trigger price
orderRespType	ENUM	-	ACK and Result required order ack immediatel	ACK,RESULT,NO_ACK

HTTP Response:

{
  "status": 0,
  "error": "OK",
  "data": {
    "orderId": 1521325650,
    "clientOrderId": "WEB9C6IB7h8absN",
    "symbol": "btcusdt",
    "isolated": true,
    "cumQty": "0.000000",
    "cumQuote": "0.000000",
    "executedQty": "0.000000",
    "avgPrice": "0.000000",
    "origQty": "0.010000",
    "price": "426.000000",
    "side": "BUY",
    "positionSide": "LONG",
    "timeInForce": "GTC",
    "origType": "LIMIT",
    "type": "LIMIT",
    "activatePrice": null,
    "priceRate": null,
    "triggerPrice": "0.000000",
    "triggerType": "TRIGGER_NONE",
    "tpTriggerType": "TRIGGER_NONE",
    "tpTriggerPrice": "0.000000",
    "slTriggerType": "TRIGGER_NONE",
    "slTriggerPrice": "0.000000",
    "strategyParentId": 0,
    "status": "NEW"
  }
}

Important fields description
- Order average filled price, inverse contract:avgPrice = (cumQty/cumValueEv)/contractSize; linear contract: avgPrice = (cumValueEv/cumQty)/contractSize. contractSize is fixed in product api.

Field	Description
status	order status
cumQty	cumulative filled order quantity
orderId	internal unique order id

Cancel Single Order

Request

POST /order/v1/private/orders/cancel-order

{
  "symbol": "btcusdt",
  "orderId": 1521325650
}

Response
- Full Order

{
  "status": 0,
  "error": "OK",
  "data": {
    "orderId": 1521325650,
    "clientOrderId": "WEB9C6IB7h8absN",
    "symbol": "btcusdt",
    "isolated": true,
    "cumQty": "0.000000",
    "cumQuote": "0.000000",
    "executedQty": "0.000000",
    "avgPrice": "0.000000",
    "origQty": "0.010000",
    "price": "426.000000",
    "side": "BUY",
    "positionSide": "LONG",
    "timeInForce": "GTC",
    "origType": "LIMIT",
    "type": "LIMIT",
    "activatePrice": null,
    "priceRate": null,
    "triggerPrice": "0.000000",
    "triggerType": "TRIGGER_NONE",
    "tpTriggerType": "TRIGGER_NONE",
    "tpTriggerPrice": "0.000000",
    "slTriggerType": "TRIGGER_NONE",
    "slTriggerPrice": "0.000000",
    "strategyParentId": 0,
    "status": "NEW"
  }
}

Response
- Canceled orders

Cancel All Orders

Request

POST /order/v1/private/orders/cancel-all-order

{
  "symbol": null,
  "settleCcy": "USDT"
}

Query trading account and positions

Request

GET /user/v1/private/account/asset

Response

{
  "status": 0,
  "error": "OK",
  "data": {
    "marginBalanceUsd": "1135.21",
    "marginBalanceBtc": "0.02659473",
    "totalAccountBalance": "1135.26",
    "totalUnRealizedPnL": "-0.06",
    "accounts": [
      {
        "currency": "USDT",
        "accountBalance": "1135.26",
        "availBalance": "1133.14",
        "unRealizedPnL": "-0.06",
        "positionMargin": "2.12",
        "bonus": "0.00",
        "display": "Tether"
      }
    ]
  }
}

Note unRealizedPnL totalUnRealizedPnL and needs to be calculated according to latest markPrice, formula is as below.

Query trading account and positions with unrealized-pnl

Below API presents unrealized pnl at markprice of positions with considerable cost, thus its ratelimit weight is very high.

Request

GET /user/v1/private/positions/current-positions

Response

{
  "status": 0,
  "error": "OK",
  "data": [
    {
      "symbol": "btcusdt",
      "positionSide": "LONG",
      "isolated": true,
      "avgEntryPrice": "42745.50000000",
      "quantity": "0.00100000",
      "isolatedMargin": "2.12231500",
      "frozenMargin": "0.00000000",
      "margin": "",
      "liqPrice": "",
      "lastFundingTime": 0,
      "lastTxTime": 1632190125650,
      "baseCurrency": "BTC",
      "quoteCurrency": "USDT",
      "settleCurrency": "USDT",
      "curTermRealisedPnl": "0.00000000",
      "cumRealizedPnl": "-0.00500000"
    }
  ]
}

Request

GET /user/v1/private/order/open-orders

Response

{
  "status": 0,
  "error": "OK",
  "data": [
    {
      "orderId": 1523707343,
      "clientOrderId": "WEBjCwL6V6SBQ6e",
      "symbol": "ethusdt",
      "type": "LIMIT",
      "origQty": "0.12",
      "executedQty": "0.00",
      "price": "300.00",
      "timeInForce": "GTC",
      "isolated": true,
      "side": "BUY",
      "positionSide": "LONG",
      "transactTime": 1632192208043,
      "status": "NEW",
      "markPriceAtPlace": "3013.71",
      "lastPriceAtPlace": null,
      "closePosition": false,
      "triggerPrice": "0.00",
      "triggerType": "TRIGGER_NONE",
      "tpTriggerType": "TRIGGER_NONE",
      "tpTriggerPrice": "0.00",
      "slTriggerType": "TRIGGER_NONE",
      "slTriggerPrice": "0.00",
      "strategyParentId": 0
    },
    {
      "orderId": 1523696056,
      "clientOrderId": "WEBxKKzzEZIkd0h",
      "symbol": "btcusdt",
      "type": "LIMIT",
      "origQty": "0.130",
      "executedQty": "0.000",
      "price": "426.0",
      "timeInForce": "GTC",
      "isolated": true,
      "side": "BUY",
      "positionSide": "LONG",
      "transactTime": 1632192194291,
      "status": "NEW",
      "markPriceAtPlace": "42782.6",
      "lastPriceAtPlace": null,
      "closePosition": false,
      "triggerPrice": "0.0",
      "triggerType": "TRIGGER_NONE",
      "tpTriggerType": "TRIGGER_NONE",
      "tpTriggerPrice": "0.0",
      "slTriggerType": "TRIGGER_NONE",
      "slTriggerPrice": "0.0",
      "strategyParentId": 0
    }
  ]
}

Change leverage

Request

PUT /order/v1/private/accounts/adjust-leverage

{
  "symbol": "ethusdt",
  "isolated": true,
  "leverage": "10"
}

Field	Type	Description
symbol	string	which position needs to change
leverage	integer	unscaled leverage
isolated	boolean	isolated or crossed

Response

{
  "status": 0,
  "error": "OK",
  "data": {
    "symbol": null,
    "isolated": true,
    "leverage": 10,
    "maxNotionalValue": 0
  }
}

Assign balances for isolated margin

Request

PUT /order/v1/private/accounts/adjust-position-margin

{
  "symbol": "btcusdt",
  "positionSide": "LONG",
  "changeAmount": "0.1"
}

Query Recent Trades

Request：

GET /user/v1/private/order/trade-histories?symbol=eth

Field	Type	Description
symbol	String	Contract symbol name

Response:

{
  "status": 0,
  "error": null,
  "data": {
    "rows": [
      {
        "tradeId": 10485580,
        "userId": 100177,
        "orderId": 1522806127,
        "symbol": "btcusdt",
        "side": "SELL",
        "positionSide": "LONG",
        "fee": "-0.44894800",
        "lastQty": "0.030",
        "lastPrice": "42757.0",
        "realizedPnl": "1127.64000000",
        "isolated": false,
        "liquidationType": "L_NONE",
        "baseCcy": "BTC",
        "settledCcy": "USDT",
        "transactionTime": 1632191344624,
        "maker": false
      },
      ...
      ]
 }
}

Query Recent Orders

Request：

GET /user/v1/private/order/order-histories?symbol=btc

Field	Type	Description
symbol	String	Contract symbol name

Response:

{
  "status": 0,
  "error": null,
  "data": {
    "rows": [
      {
        "orderId": 1522808722,
        "clientOrderId": "WEBoWd7RAKV0fH0",
        "symbol": "btcusdt",
        "type": "LIMIT",
        "origQty": "0.100",
        "executedQty": "0.000",
        "avlPrice": "0.0",
        "price": "4211.0",
        "timeInForce": "GTC",
        "isolated": true,
        "side": "BUY",
        "positionSide": "LONG",
        "transactTime": 1632191376587,
        "markPriceAtPlace": "42744.9",
        "lastPriceAtPlace": "42757.0",
        "status": "CANCELED",
        "closePosition": false,
        "triggerPrice": "0.0",
        "triggerType": "TRIGGER_NONE",
        "tpTriggerType": "TRIGGER_NONE",
        "tpTriggerPrice": "0.0",
        "slTriggerType": "TRIGGER_NONE",
        "slTriggerPrice": "0.0",
        "strategyParentId": 0,
        "liqCounterpartyType": "L_NONE",
        "baseCcy": "BTC",
        "settledCcy": "USDT"
      },
      ...
      ]
 }
}

Field	Type	Description	Possible values
timestamp	Integer	Timestamp in nanoseconds
side	String	Trade side string	BUY, SELL
positionSide	String	Position Side	LONG, SHORT
price	String	Scaled trade price
lastQty	String	trade size
marker	boolean	marker or taker
symbol	String	Contract symbol name
avlPrice	String	average execution price

Websocket Stream API:

Live Subscribing/Unsubscribing to streams

The following data can be sent through the websocket instance in order to subscribe/unsubscribe from streams. Examples can be seen below.
The id used in the JSON payloads is an unsigned INT used as an identifier to uniquely identify the messages going back and forth.
In the response, if the result received is null this means the request sent was a success for non-query requests (e.g. Subscribing/Unsubscribing).

Subscribe to a stream

Request

  {
    "method": "SUBSCRIBE",
    "params": [
      "btcusdt@depth10"
    ],
    "id": 1
  }

Response

  {
    "result": null,
    "id": 1
  }

Unsubscribe to a stream

Request

 {
   "method": "UNSUBSCRIBE",
   "params": [
     "btcusdt@depth10"
   ],
   "id": 15
 }

Response
```
{
  "result": null,
  "id": 15
}
```

Listing Subscriptions

Request

{
  "method": "LIST_SUBSCRIPTIONS",
  "id": 4
}

Response

{
  "result": [
    "btcusdt@depth10"
  ],
  "id": 4
}

## Kline/Candlestick Streams The Kline/Candlestick Stream push updates to the current klines/candlestick every second.

Kline/Candlestick chart intervals:

m -> minutes; h -> hours; d -> days; w -> weeks; M -> months

Stream Name: <symbol>@kline_<interval>

Payload:

{
  "e": "kline",     // Event type
  "E": 123456789,   // Event time
  "s": "BNBBTC",    // Symbol
  "k": {
    "t": 123400000, // Kline start time
    "T": 123460000, // Kline close time
    "s": "BNBBTC",  // Symbol
    "i": "1m",      // Interval
    "f": 100,       // First trade ID
    "L": 200,       // Last trade ID
    "o": "0.0010",  // Open price
    "c": "0.0020",  // Close price
    "h": "0.0025",  // High price
    "l": "0.0015",  // Low price
    "v": "1000",    // Base asset volume
    "n": 100,       // Number of trades
    "x": false,     // Is this kline closed?
    "q": "1.0000",  // Quote asset volume
    "V": "500",     // Taker buy base asset volume
    "Q": "0.500",   // Taker buy quote asset volume
  }
}

Mark Price Streams

Mark price and funding rate for a single symbol pushed every second.

Stream Name: @markPrice

Payload:

  {
        "e": "markPriceUpdate",     // Event type
        "E": 1632195394014,         // Event time
        "s": "ETHUSDT",             // Symbol
        "p": "11794.15000000",      // Mark price
        "i": "11784.62659091",      // Index price
        "P": "11784.25641265",      // Estimated Settle Price, only useful in the last hour before the settlement starts
        "r": "0.00038167",          // Funding rate
        "T": 1632211200000          // Next funding time
}

ticker

Stream Name: @ticker

Payload:

{
  "e": "24hrTicker",  // Event type
  "E": 123456789,     // Event time
  "s": "BTCUSDT",     // Symbol
  "p": "0.0015",      // Price change
  "P": "250.00",      // Price change percent
  "w": "0.0018",      // Weighted average price
  "c": "0.0025",      // Last price
  "Q": "10",          // Last quantity
  "o": "0.0010",      // Open price
  "h": "0.0025",      // High price
  "l": "0.0010",      // Low price
  "v": "10000",       // Total traded base asset volume
  "q": "18",          // Total traded quote asset volume
  "O": 0,             // Statistics open time
  "C": 86400000,      // Statistics close time
  "F": 0,             // First trade ID
  "L": 18150,         // Last trade Id
  "n": 18151          // Total number of trades
}

order book

Stream Name: @depth

level include:

Payload:

{
    "e": "depthUpdate", // Event type
        "E": 123456789,     // Event time
        "T": 123456788,     // Transaction time 
        "s": "BTCUSDT",     // Symbol
        "U": 157,           // First update ID in event
        "u": 160,           // Final update ID in event
        "pu": 149,          // Final update Id in last stream(ie `u` in last stream)
        "b": [              // Bids to be updated
        [
            "0.0024",       // Price level to be updated
            "10"            // Quantity
        ]
    ],
        "a": [              // Asks to be updated
        [
            "0.0026",       // Price level to be updated
            "100"          // Quantity
        ]
    ]
}

live trade

Stream Name: @trade

Payload:

{
    "e": "trade", // Event type
        "E": 123456789, // Event time
        "T": 123456788, // Transaction time
        "s": "BTCUSDT", // Symbol
        "t": 157, // update id
        "p":  "60221.0", // price
        "q": "0.01",  // quantity 
        "X": "Market", //Trade type
        "m": true,  // is buyer maker 
}

WOAftp / mayex-api-docs

Mayex Public API

General public API

REST API Standards

Restful API Response

HTTP Return Codes

Rest Response format

Common constants

Query Product Information

Trade API List

Place Order

Cancel Single Order

Cancel All Orders

Query trading account and positions

Query trading account and positions with unrealized-pnl

Change leverage

Assign balances for isolated margin

Query Recent Trades

Query Recent Orders

Websocket Stream API:

Live Subscribing/Unsubscribing to streams

Subscribe to a stream

Unsubscribe to a stream

Listing Subscriptions

Mark Price Streams

ticker

order book

live trade

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