Modify Order

Description

Modify an active order's price and / or quantity. Internally implemented as cancel-and-resubmit: the previous resting order is removed from the book, margin freezing is recomputed for the new size, and a fresh order is queued under the same orderId (so callers don't see the id change). The updateTime timestamp is refreshed. Already-filled quantity is preserved — modify is rejected with AMOUNT_BELOW_FILLED if quantity < executedQty.

Only LIMIT, STOP, STOP_MARKET, TAKE_PROFIT, and TAKE_PROFIT_MARKET orders can be modified; MARKET and trailing-stop orders cannot.

HTTP Request

PUT /fapi/v1/order (HMAC SHA256)

Weight

1

Request Parameters

Name	Type	Required	Description
symbol	STRING	YES	Trading pair
orderId	LONG	NO	System order ID
origClientOrderId	STRING	NO	User-defined order ID
side	ENUM	NO	Order side: BUY, SELL. Optional — defaults to the existing order's side.
quantity	DECIMAL	NO	New total order quantity (must be ≥ already-filled quantity).
price	DECIMAL	NO	New limit price.
stopPrice	DECIMAL	NO	New trigger price (for STOP* / TAKE_PROFIT*).
recvWindow	LONG	NO	See Endpoint Security Type
timestamp	LONG	YES	Timestamp

At least one of quantity, price, or stopPrice must be sent — otherwise the request is a no-op and rejected. Either orderId or origClientOrderId must be sent to identify the target order.

Response Example

{
    "orderId": 2254222045,
    "symbol": "BTCUSDT",
    "status": "NEW",
    "clientOrderId": "testOrderModify1",
    "price": "60000",
    "origQty": "0.1",
    "cumQty": "0",
    "cumQuote": "0",
    "timeInForce": "GTC",
    "type": "LIMIT",
    "side": "BUY",
    "stopPrice": "0",
    "workingType": "CONTRACT_PRICE",
    "updateTime": 1623910239123
}

Code Examples

cURL

API_KEY="your_api_key"
API_SECRET="your_api_secret"
TIMESTAMP=$(date +%s%3N)
QUERY_STRING="symbol=BTCUSDT&orderId=2254222045&side=BUY&quantity=0.1&price=60000&timestamp=${TIMESTAMP}"
SIGNATURE=$(echo -n "${QUERY_STRING}" | openssl dgst -sha256 -hmac "${API_SECRET}" | awk '{print $2}')

curl -s -X PUT \
  -H "X-MBX-APIKEY: ${API_KEY}" \
  "https://api-sepolia.ztdx.io/fapi/v1/order?${QUERY_STRING}&signature=${SIGNATURE}"

Python

import time, hmac, hashlib, requests, json

API_KEY = "your_api_key"
API_SECRET = "your_api_secret"
BASE_URL = "https://api.ztdx.io"

def sign(msg: str) -> str:
    return hmac.new(API_SECRET.encode(), msg.encode(), hashlib.sha256).hexdigest()

def signed_put(path, body={}):
    ts = int(time.time() * 1000)
    qs = f"timestamp={ts}"
    body_str = json.dumps(body, separators=(',', ':'))
    sig = sign(qs + body_str)
    return requests.put(
        f"{BASE_URL}{path}?timestamp={ts}&signature={sig}",
        data=body_str,
        headers={"X-MBX-APIKEY": API_KEY, "Content-Type": "application/json"},
    )

# Modify an existing order's quantity and price
resp = signed_put("/fapi/v1/order", body={
    "symbol": "BTCUSDT",
    "orderId": "2254222045",
    "side": "BUY",
    "quantity": "0.1",
    "price": "60000",
})
print(resp.json())