Get Maximum Open Size

Calculate the maximum position size that can be opened based on available balance, leverage, and current market conditions.

HTTP Request

GET /api/v1/future/account/max-open

Request Parameters

Parameter	Type	Required	Description
symbol	string	Yes	Trading pair symbol (e.g., BTCUSDT)
posSide	string	Yes	Position side: "LONG" or "SHORT"
orderType	string	Yes	Order type: "LIMIT" or "MARKET"
openPrice	string	No	Opening price (required when orderType is "LIMIT")

Request Example

Market Order Request

curl -X GET "https://open-api.bydoxe.com/api/v1/future/account/max-open?symbol=BTCUSDT&posSide=LONG&orderType=MARKET" \
  -H "ACCESS-KEY: your-api-key" \
  -H "ACCESS-SIGN: your-signature" \
  -H "ACCESS-PASSPHRASE: your-passphrase" \
  -H "ACCESS-TIMESTAMP: 1659076670000"

Limit Order Request

curl -X GET "https://open-api.bydoxe.com/api/v1/future/account/max-open?symbol=BTCUSDT&posSide=LONG&orderType=LIMIT&openPrice=90000.00" \
  -H "ACCESS-KEY: your-api-key" \
  -H "ACCESS-SIGN: your-signature" \
  -H "ACCESS-PASSPHRASE: your-passphrase" \
  -H "ACCESS-TIMESTAMP: 1659076670000"

Response Parameters

Parameter	Type	Description
code	string	Response code
msg	string	Response message
requestTime	number	Request timestamp in milliseconds
data	object	Maximum open data
> maxOpen	string	Maximum position size that can be opened

Response Example

Success Response

{
  "code": "00000",
  "msg": "success",
  "requestTime": 1732000000000,
  "data": {
    "maxOpen": "317.54"
  }
}

Error Codes

Code	Message
40034	symbol does not exist
40001	Order price is required
40002	Order price decimal precision is too high