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Request Security

  • Each method has a security type indicating required API key permissions, shown next to the method name (e.g., New order (TRADE)).
  • If unspecified, the security type is NONE.
  • Except for NONE, all methods with a security type are considered SIGNED requests (i.e. including a signature), except for listenKey management.
  • Secure methods require a valid API key to be specified and authenticated.
    • API keys can be created on the SPOT Test Network upon logging in with your Github account.
    • Both API key and secret key are sensitive. Never share them with anyone. If you notice unusual activity in your account, immediately revoke all the keys and contact Binance support.
  • API keys can be configured to allow access only to certain types of secure methods.
    • For example, you can have an API key with TRADE permission for trading, while using a separate API key with USER_DATA permission to monitor your order status.
    • By default, an API key cannot TRADE. You need to enable trading in API Management first.
Security typeDescription
NONEPublic market data
TRADETrading on the exchange, placing and canceling orders
USER_DATAPrivate account information, such as order status and your trading history
USER_STREAMManaging User Data Stream subscriptions

SIGNED Endpoint security​

  • SIGNED endpoints require an additional parameter, signature, to be sent in the query string or request body.
  • The signature is not case sensitive.
  • Please consult the examples below on how to compute signature, depending on which API key type you are using.

Timing security​

  • SIGNED requests also require a timestamp parameter which should be the current timestamp either in milliseconds or microseconds. (See General API Information)
  • An additional optional parameter, recvWindow, specifies for how long the request stays valid and may only be specified in milliseconds.
    • If recvWindow is not sent, it defaults to 5000 milliseconds.
    • Maximum recvWindow is 60000 milliseconds.
  • Request processing logic is as follows:
serverTime = getCurrentTime()
if (timestamp < (serverTime + 1 second) && (serverTime - timestamp) <= recvWindow) {
  // begin processing request
  serverTime = getCurrentTime()
  if (serverTime - timestamp) <= recvWindow {
    // forward request to Matching Engine
  } else {
    // reject request
  }
  // finish processing request
} else {
  // reject request
}

Serious trading is about timing. Networks can be unstable and unreliable, which can lead to requests taking varying amounts of time to reach the servers. With recvWindow, you can specify that the request must be processed within a certain number of milliseconds or be rejected by the server.

It is recommended to use a small recvWindow of 5000 or less!

SIGNED Endpoint Examples for POST /api/v3/order​

HMAC Keys​

Here is a step-by-step example of how to send a valid signed payload from the Linux command line using echo, openssl, and curl.

KeyValue
apiKeyvmPUZE6mv9SD5VNHk4HlWFsOr6aKE2zvsw0MuIgwCIPy6utIco14y7Ju91duEh8A
secretKeyNhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j
ParameterValue
symbolLTCBTC
sideBUY
typeLIMIT
timeInForceGTC
quantity1
price0.1
recvWindow5000
timestamp1499827319559

Example 1: As a request body

  • requestBody: symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559

  • HMAC SHA256 signature:

    [linux]$ echo -n "symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559" | openssl dgst -sha256 -hmac "NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j"
    (stdin)= c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71

  • curl command:

    (HMAC SHA256)
    [linux]$ curl -H "X-MBX-APIKEY: vmPUZE6mv9SD5VNHk4HlWFsOr6aKE2zvsw0MuIgwCIPy6utIco14y7Ju91duEh8A" -X POST 'https://api.binance.com/api/v3/order' -d 'symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559&signature=c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71'

Example 2: As a query string

  • queryString: symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559

  • HMAC SHA256 signature:

    [linux]$ echo -n "symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559" | openssl dgst -sha256 -hmac "NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j"
    (stdin)= c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71

  • curl command:

    (HMAC SHA256)
    [linux]$ curl -H "X-MBX-APIKEY: vmPUZE6mv9SD5VNHk4HlWFsOr6aKE2zvsw0MuIgwCIPy6utIco14y7Ju91duEh8A" -X POST 'https://api.binance.com/api/v3/order?symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559&signature=c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71'

Example 3: Mixed query string and request body

  • queryString: symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC

  • requestBody: quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559

  • HMAC SHA256 signature:

    [linux]$ echo -n "symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTCquantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559" | openssl dgst -sha256 -hmac "NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j"
    (stdin)= 0fd168b8ddb4876a0358a8d14d0c9f3da0e9b20c5d52b2a00fcf7d1c602f9a77

  • curl command:

    (HMAC SHA256)
    [linux]$ curl -H "X-MBX-APIKEY: vmPUZE6mv9SD5VNHk4HlWFsOr6aKE2zvsw0MuIgwCIPy6utIco14y7Ju91duEh8A" -X POST 'https://api.binance.com/api/v3/order?symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC' -d 'quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559&signature=0fd168b8ddb4876a0358a8d14d0c9f3da0e9b20c5d52b2a00fcf7d1c602f9a77'

Note that the signature is different in example 3. There is no & between "GTC" and "quantity=1".

RSA Keys​

This will be a step by step process how to create the signature payload to send a valid signed payload.

We support PKCS#8 currently.

To get your API key, you need to upload your RSA Public Key to your account and a corresponding API key will be provided for you.

For this example, the private key will be referenced as ./test-prv-key.pem

KeyValue
apiKeyCAvIjXy3F44yW6Pou5k8Dy1swsYDWJZLeoK2r8G4cFDnE9nosRppc2eKc1T8TRTQ
ParameterValue
symbolBTCUSDT
sideSELL
typeLIMIT
timeInForceGTC
quantity1
price0.2
timestamp1668481559918
recvWindow5000

Step 1: Construct the payload

Arrange the list of parameters into a string. Separate each parameter with a &.

For the parameters above, the signature payload would look like this:

symbol=BTCUSDT&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000

Step 2: Compute the signature:

  1. Encode signature payload as ASCII data.
  2. Sign payload using RSASSA-PKCS1-v1_5 algorithm with SHA-256 hash function.
$ echo -n 'symbol=BTCUSDT&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000' | openssl dgst -sha256 -sign ./test-prv-key.pem
  1. Encode output as base64 string.
$  echo -n 'symbol=BTCUSDT&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000' | openssl dgst -sha256 -sign ./test-prv-key.pem | openssl enc -base64 -A
HZ8HOjiJ1s/igS9JA+n7+7Ti/ihtkRF5BIWcPIEluJP6tlbFM/Bf44LfZka/iemtahZAZzcO9TnI5uaXh3++lrqtNonCwp6/245UFWkiW1elpgtVAmJPbogcAv6rSlokztAfWk296ZJXzRDYAtzGH0gq7CgSJKfH+XxaCmR0WcvlKjNQnp12/eKXJYO4tDap8UCBLuyxDnR7oJKLHQHJLP0r0EAVOOSIbrFang/1WOq+Jaq4Efc4XpnTgnwlBbWTmhWDR1pvS9iVEzcSYLHT/fNnMRxFc7u+j3qI//5yuGuu14KR0MuQKKCSpViieD+fIti46sxPTsjSemoUKp0oXA==
  1. Since the signature may contain / and =, this could cause issues with sending the request. So the signature has to be URL encoded.
HZ8HOjiJ1s%2FigS9JA%2Bn7%2B7Ti%2FihtkRF5BIWcPIEluJP6tlbFM%2FBf44LfZka%2FiemtahZAZzcO9TnI5uaXh3%2B%2BlrqtNonCwp6%2F245UFWkiW1elpgtVAmJPbogcAv6rSlokztAfWk296ZJXzRDYAtzGH0gq7CgSJKfH%2BXxaCmR0WcvlKjNQnp12%2FeKXJYO4tDap8UCBLuyxDnR7oJKLHQHJLP0r0EAVOOSIbrFang%2F1WOq%2BJaq4Efc4XpnTgnwlBbWTmhWDR1pvS9iVEzcSYLHT%2FfNnMRxFc7u%2Bj3qI%2F%2F5yuGuu14KR0MuQKKCSpViieD%2BfIti46sxPTsjSemoUKp0oXA%3D%3D
  1. The curl command:
curl -H "X-MBX-APIKEY: CAvIjXy3F44yW6Pou5k8Dy1swsYDWJZLeoK2r8G4cFDnE9nosRppc2eKc1T8TRTQ" -X POST 'https://api.binance.com/api/v3/order?symbol=BTCUSDT&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000&signature=HZ8HOjiJ1s%2FigS9JA%2Bn7%2B7Ti%2FihtkRF5BIWcPIEluJP6tlbFM%2FBf44LfZka%2FiemtahZAZzcO9TnI5uaXh3%2B%2BlrqtNonCwp6%2F245UFWkiW1elpgtVAmJPbogcAv6rSlokztAfWk296ZJXzRDYAtzGH0gq7CgSJKfH%2BXxaCmR0WcvlKjNQnp12%2FeKXJYO4tDap8UCBLuyxDnR7oJKLHQHJLP0r0EAVOOSIbrFang%2F1WOq%2BJaq4Efc4XpnTgnwlBbWTmhWDR1pvS9iVEzcSYLHT%2FfNnMRxFc7u%2Bj3qI%2F%2F5yuGuu14KR0MuQKKCSpViieD%2BfIti46sxPTsjSemoUKp0oXA%3D%3D'

A sample Bash script below does the similar steps said above.

API_KEY="put your own API Key here"
PRIVATE_KEY_PATH="test-prv-key.pem"
# Set up the request:
API_METHOD="POST"
API_CALL="api/v3/order"
API_PARAMS="symbol=BTCUSDT&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2"
# Sign the request:
timestamp=$(date +%s000)
api_params_with_timestamp="$API_PARAMS&timestamp=$timestamp"
signature=$(echo -n "$api_params_with_timestamp" \
            | openssl dgst -sha256 -sign "$PRIVATE_KEY_PATH" \
            | openssl enc -base64 -A)
# Send the request:
curl -H "X-MBX-APIKEY: $API_KEY" -X "$API_METHOD" \
    "https://api.binance.com/$API_CALL?$api_params_with_timestamp" \
    --data-urlencode "signature=$signature"

Ed25519 Keys​

Note: It is highly recommended to use Ed25519 API keys as it should provide the best performance and security out of all supported key types.

ParameterValue
symbolBTCUSDT
sideSELL
typeLIMIT
timeInForceGTC
quantity1
price0.2
timestamp1668481559918

This is a sample code in Python to show how to sign the payload with an Ed25519 key.

#!/usr/bin/env python3

import base64
import requests
import time
from cryptography.hazmat.primitives.serialization import load_pem_private_key

# Set up authentication
API_KEY='put your own API Key here'
PRIVATE_KEY_PATH='test-prv-key.pem'

# Load the private key.
# In this example the key is expected to be stored without encryption,
# but we recommend using a strong password for improved security.
with open(PRIVATE_KEY_PATH, 'rb') as f:
    private_key = load_pem_private_key(data=f.read(),
                                       password=None)

# Set up the request parameters
params = {
    'symbol':       'BTCUSDT',
    'side':         'SELL',
    'type':         'LIMIT',
    'timeInForce':  'GTC',
    'quantity':     '1.0000000',
    'price':        '0.20',
}

# Timestamp the request
timestamp = int(time.time() * 1000) # UNIX timestamp in milliseconds
params['timestamp'] = timestamp

# Sign the request
payload = '&'.join([f'{param}={value}' for param, value in params.items()])
signature = base64.b64encode(private_key.sign(payload.encode('ASCII')))
params['signature'] = signature

# Send the request
headers = {
    'X-MBX-APIKEY': API_KEY,
}
response = requests.post(
    'https://api.binance.com/api/v3/order',
    headers=headers,
    data=params,
)
print(response.json())