Request Security

• Each endpoint has a security type indicating required API key permissions, shown next to the endpoint name (e.g., New order (TRADE)).
• If unspecified, the security type is NONE.
• Except for NONE, all endpoints with a security type are considered SIGNED requests (i.e. including a signature), except for listenKey management.
• Secure endpoints 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 endpoints.
  • 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 type	Description
NONE	Public market data
TRADE	Trading on the exchange, placing and canceling orders
USER_DATA	Private account information, such as order status and your trading history
USER_STREAM	Managing User Data Stream subscriptions

SIGNED Endpoint security

• SIGNED endpoints require an additional parameter, signature, to be sent in the query string or request body.

Signature Case Sensitivity

• HMAC: Signatures generated using HMAC are not case-sensitive. This means the signature string can be verified regardless of letter casing.
• RSA: Signatures generated using RSA are case-sensitive.
• Ed25519: Signatures generated using Ed25519 are also case-sensitive

Please consult SIGNED request example (HMAC), SIGNED request example (RSA), and SIGNED request example (Ed25519) 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.
  • recvWindow supports up to three decimal places of precision (e.g., 6000.346) so that microseconds may be specified.
  • 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! The max cannot go beyond 60,000!

SIGNED Endpoint Examples for POST /api/v3/order

HMAC Keys

The signature payload of your request is the query string concatenated without separator to the HTTP body. Any non-ASCII character must be percent-encoded before signing.

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. There is one example with a symbol name comprised entirely of ASCII characters and one example with a symbol name containing non-ASCII characters.

Example API key and secret key:

Key	Value
apiKey	vmPUZE6mv9SD5VNHk4HlWFsOr6aKE2zvsw0MuIgwCIPy6utIco14y7Ju91duEh8A
secretKey	NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j

WARNING: DO NOT SHARE YOUR API KEY AND SECRET KEY WITH ANYONE.

The example keys are provided here only for illustrative purposes.

Example of request with a symbol name comprised entirely of ASCII characters:

Parameter	Value
symbol	LTCBTC
side	BUY
type	LIMIT
timeInForce	GTC
quantity	1
price	0.1
recvWindow	5000
timestamp	1499827319559

Example of a request with a symbol name containing non-ASCII characters:

Parameter	Value
symbol	１２３４５６
side	BUY
type	LIMIT
timeInForce	GTC
quantity	1
price	0.1
recvWindow	5000
timestamp	1499827319559

Step 1: Construct the signature payload

1. Format parameters as parameter=value pairs separated by &.
2. Percent-encode the string.

For the first set of example parameters (ASCII only), the parameter=value string should look like this:

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

After percent-encoding, the signature payload should look like this:

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

For the second set of example parameters (some non-ASCII characters), the parameter=value string should look like this:

symbol=１２３４５６&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559

After percent-encoding, the signature payload should look like this:

symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559

Step 2: Compute the signature

1. Use the secretKey of your API key as the signing key for the HMAC-SHA-256 algorithm.
2. Sign the signature payload constructed in Step 1.
3. Encode the HMAC-SHA-256 output as a hex string.

Note that secretKey and the payload are case-sensitive, while the resulting signature value is case-insensitive.

Example commands

For the first set of example parameters (ASCII only):

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

c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71

For the second set of example parameters (some non-ASCII characters):

$ echo -n "symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559" | openssl dgst -sha256 -hmac "NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j"

e1353ec6b14d888f1164ae9af8228a3dbd508bc82eb867db8ab6046442f33ef3

Step 3: Add signature to the request

Complete the request by adding the signature parameter to the query string.

For the first set of example parameters (ASCII only):

curl -s -v -H "X-MBX-APIKEY: $apiKey" -X POST "https://testnet.binance.vision/api/v3/order?symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559&signature=c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71"

For the second set of example parameters (some non-ASCII characters)

curl -s -v -H "X-MBX-APIKEY: $apiKey" -X POST "https://testnet.binance.vision/api/v3/order?symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559&signature=e1353ec6b14d888f1164ae9af8228a3dbd508bc82eb867db8ab6046442f33ef3"

Here is a sample Bash script performing all the steps above:

apiKey="vmPUZE6mv9SD5VNHk4HlWFsOr6aKE2zvsw0MuIgwCIPy6utIco14y7Ju91duEh8A"
secretKey="NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j"

payload="symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000&timestamp=1499827319559"

# Sign the request

signature=$(echo -n "$payload" | openssl dgst -sha256 -hmac "$secretKey")
signature=${signature#*= }    # Keep only the part after the "= "

# Send the request

curl -H "X-MBX-APIKEY: $apiKey" -X POST "https://testnet.binance.vision/api/v3/order?$payload&signature=$signature"

RSA Keys

The signature payload of your request is the query string concatenated without separator to the HTTP body. Any non-ASCII character must be percent-encoded before signing.

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.

Only PKCS#8 keys are supported.

There is one example with a symbol name comprised entirely of ASCII characters and one example with a symbol name containing non-ASCII characters.

These examples assume the private key is stored in the file ./test-prv-key.pem.

Key	Value
apiKey	CAvIjXy3F44yW6Pou5k8Dy1swsYDWJZLeoK2r8G4cFDnE9nosRppc2eKc1T8TRTQ

Example of request with a symbol name comprised entirely of ASCII characters:

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

Example of a request with a symbol name containing non-ASCII characters:

Parameter	Value
symbol	１２３４５６
side	SELL
type	LIMIT
timeInForce	GTC
quantity	1
price	0.2
timestamp	1668481559918
recvWindow	5000

Step 1: Construct the signature payload

1. Format parameters as parameter=value pairs separated by &.
2. Percent-encode the string.

For the first set of example parameters (ASCII only), the parameter=value string should look like this:

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

After percent-encoding, the signature payload should look like this:

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

For the second set of example parameters (some non-ASCII characters), the parameter=value string should look like this:

symbol=１２３４５６=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000

After percent-encoding, the signature payload should look like this:

symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000

Step 2: Compute the signature

1. Sign the signature payload constructed in Step 1 using the RSASSA-PKCS1-v1_5 algorithm with SHA-256 hash function.
2. Encode the output in base64.

Note that the payload and the resulting signature are case-sensitive.

For the first set of example parameters (ASCII only):

$  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 | tr -d '\n'
HZ8HOjiJ1s/igS9JA+n7+7Ti/ihtkRF5BIWcPIEluJP6tlbFM/Bf44LfZka/iemtahZAZzcO9TnI5uaXh3++lrqtNonCwp6/245UFWkiW1elpgtVAmJPbogcAv6rSlokztAfWk296ZJXzRDYAtzGH0gq7CgSJKfH+XxaCmR0WcvlKjNQnp12/eKXJYO4tDap8UCBLuyxDnR7oJKLHQHJLP0r0EAVOOSIbrFang/1WOq+Jaq4Efc4XpnTgnwlBbWTmhWDR1pvS9iVEzcSYLHT/fNnMRxFc7u+j3qI//5yuGuu14KR0MuQKKCSpViieD+fIti46sxPTsjSemoUKp0oXA==

For the second set of example parameters (some non-ASCII characters):

$  echo -n 'symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&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 | tr -d '\n'

qJtv66wyp/1mZE+mIFAAMUoTe8xkmLN7/eAZjuC9x1ocxovItHLl/sNK7Wq8QjgiHqGn0bb8P7yVvGBEd1gFe71NQ8aM0M+JNIMz5UFxfeA53rXjFlvsyH1Sig+OuO9Nz5nhCaJ6bEfj2iuv7w27pB3L8MVqmoCi6D9C/QMiLxtPaR70CxtnvoOlIgPmpv2bQy029A31NEK19ieVLkoyp1EUkXRaX3v0mohx8yMnUG1dhX9nUg3Oy8TYZ03DQy7kHDGkMKisNX7rt/GuGx1HIgjFclDGLsbAFIodvSLjm9FbseasMELoxlAJDlwRnW8zo5sQmL0Fz7ao935QBynrng==

3. Percent-encode the base64 string.

For the first set of example parameters (ASCII only):

HZ8HOjiJ1s%2FigS9JA%2Bn7%2B7Ti%2FihtkRF5BIWcPIEluJP6tlbFM%2FBf44LfZka%2FiemtahZAZzcO9TnI5uaXh3%2B%2BlrqtNonCwp6%2F245UFWkiW1elpgtVAmJPbogcAv6rSlokztAfWk296ZJXzRDYAtzGH0gq7CgSJKfH%2BXxaCmR0WcvlKjNQnp12%2FeKXJYO4tDap8UCBLuyxDnR7oJKLHQHJLP0r0EAVOOSIbrFang%2F1WOq%2BJaq4Efc4XpnTgnwlBbWTmhWDR1pvS9iVEzcSYLHT%2FfNnMRxFc7u%2Bj3qI%2F%2F5yuGuu14KR0MuQKKCSpViieD%2BfIti46sxPTsjSemoUKp0oXA%3D%3D

For the second set of example parameters (some non-ASCII characters):

qJtv66wyp%2F1mZE%2BmIFAAMUoTe8xkmLN7%2FeAZjuC9x1ocxovItHLl%2FsNK7Wq8QjgiHqGn0bb8P7yVvGBEd1gFe71NQ8aM0M%2BJNIMz5UFxfeA53rXjFlvsyH1Sig%2BOuO9Nz5nhCaJ6bEfj2iuv7w27pB3L8MVqmoCi6D9C%2FQMiLxtPaR70CxtnvoOlIgPmpv2bQy029A31NEK19ieVLkoyp1EUkXRaX3v0mohx8yMnUG1dhX9nUg3Oy8TYZ03DQy7kHDGkMKisNX7rt%2FGuGx1HIgjFclDGLsbAFIodvSLjm9FbseasMELoxlAJDlwRnW8zo5sQmL0Fz7ao935QBynrng%3D%3D

Step 3: Add signature to the request

Complete the request by adding the signature parameter to the query string.

For the first set of example parameters (ASCII only):

curl -H "X-MBX-APIKEY: CAvIjXy3F44yW6Pou5k8Dy1swsYDWJZLeoK2r8G4cFDnE9nosRppc2eKc1T8TRTQ" -X POST 'https://testnet.binance.vision/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'

For the second set of example parameters (some non-ASCII characters):

curl -H "X-MBX-APIKEY: CAvIjXy3F44yW6Pou5k8Dy1swsYDWJZLeoK2r8G4cFDnE9nosRppc2eKc1T8TRTQ" -X POST 'https://testnet.binance.vision/api/v3/order?symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000&signature=qJtv66wyp%2F1mZE%2BmIFAAMUoTe8xkmLN7%2FeAZjuC9x1ocxovItHLl%2FsNK7Wq8QjgiHqGn0bb8P7yVvGBEd1gFe71NQ8aM0M%2BJNIMz5UFxfeA53rXjFlvsyH1Sig%2BOuO9Nz5nhCaJ6bEfj2iuv7w27pB3L8MVqmoCi6D9C%2FQMiLxtPaR70CxtnvoOlIgPmpv2bQy029A31NEK19ieVLkoyp1EUkXRaX3v0mohx8yMnUG1dhX9nUg3Oy8TYZ03DQy7kHDGkMKisNX7rt%2FGuGx1HIgjFclDGLsbAFIodvSLjm9FbseasMELoxlAJDlwRnW8zo5sQmL0Fz7ao935QBynrng%3D%3D'

Here is a sample Bash script performing all the steps above:

function rawurlencode {
  local string="${1}"
  local strlen=${#string}
  local encoded=""
  local pos c o

  for (( pos=0 ; pos<strlen ; pos++ )); do
     c=${string:$pos:1}
     case "$c" in
        [-_.~a-zA-Z0-9] ) o="${c}" ;;
        * )               printf -v o '%%%02x' "'$c"
     esac
     encoded+="${o}"
  done
  echo "${encoded}"
}

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"

rawSignature=$(echo -n $api_params_with_timestamp | openssl dgst -keyform PEM -sha256 -sign $PRIVATE_KEY_PATH | openssl enc -base64 | tr -d '\n')

# Percent-encode the signature
signature=$(rawurlencode "$rawSignature")

# Send the request:
curl -H "X-MBX-APIKEY: $API_KEY" -X "$API_METHOD" \
    "https://testnet.binance.vision/$API_CALL?$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.

The signature payload of your request is the query string concatenated without separator to the HTTP body. Any non-ASCII character must be percent-encoded before signing.

There is one example with a symbol name comprised entirely of ASCII characters and one example with a symbol name containing non-ASCII characters.

These examples assume the private key is stored in the file ./test-prv-key.pem.

Key	Value
apiKey	4yNzx3yWC5bS6YTwEkSRaC0nRmSQIIStAUOh1b6kqaBrTLIhjCpI5lJH8q8R8WNO

Example of request with a symbol name comprised entirely of ASCII characters.

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

Example of a request with a symbol name containing non-ASCII characters.

Parameter	Value
symbol	１２３４５６
side	SELL
type	LIMIT
timeInForce	GTC
quantity	1
price	0.2
timestamp	1668481559918
recvWindow	5000

Step 1: Construct the signature payload

1. Format parameters as parameter=value pairs separated by &.
2. Percent-encode the string.

For the first set of example parameters (ASCII only), the parameter=value string should look like this:

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

After percent-encoding, the signature payload should look like this:

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

For the second set of example parameters (some non-ASCII characters), the parameter=value string should look like this:

symbol=１２３４５６&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000

After percent-encoding, the signature payload should look like this:

symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000

Step 2: Compute the signature

1. Sign the payload.
2. Encode the output as a base64 string.

Note that the payload and the resulting signature are case-sensitive.

For the first set of example parameters (ASCII only):

echo -n "symbol=BTCUSDT&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000" | openssl dgst -keyform PEM -sha256 -sign ./test-prv-key.pem | openssl enc -base64 | tr -d '\n'

HaZnek7KOGa/k5+f6Q1nw8lzMUpo36mRVvvLHCMUCXxlmdQQGZge1luAUKnleD/DYeD19YrqzeHbb6xU3MkSIXKhAO1MaYq48uGVYb3vJScEZVOutgMInrZzUcCWNulNkfcbmExSiymCZ5xQBw5QDuzpuDFqRZ1Xt+BZxEHBN9OYQKpoe0+ovjnXyVOaH8VUKhE/ghUWnThrXJr+hmSc5t7ggjiVPQc7pGn3qSNGCQwdpkQC9GHMr/r+8n6qeEKMYB5j/1wC4d8Jae8FQiU8xcXR0NlUgV2LAw61/ZJv5BTJpa+z5Lv1W9v6jHQWRX2O8uaG3KU/lR3spR7+oGlWOw=

For the second set of example parameters (some non-ASCII characters):

echo -n "symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000" | openssl dgst -keyform PEM -sha256 -sign ./test-prv-key.pem | openssl enc -base64 | tr -d '\n'

qJtv66wyp/1mZE+mIFAAMUoTe8xkmLN7/eAZjuC9x1ocxovItHLl/sNK7Wq8QjgiHqGn0bb8P7yVvGBEd1gFe71NQ8aM0M+JNIMz5UFxfeA53rXjFlvsyH1Sig+OuO9Nz5nhCaJ6bEfj2iuv7w27pB3L8MVqmoCi6D9C/QMiLxtPaR70CxtnvoOlIgPmpv2bQy029A31NEK19ieVLkoyp1EUkXRaX3v0mohx8yMnUG1dhX9nUg3Oy8TYZ03DQy7kHDGkMKisNX7rt/GuGx1HIgjFclDGLsbAFIodvSLjm9FbseasMELoxlAJDlwRnW8zo5sQmL0Fz7ao935QBynrng==

3. Percent-encode the base64 string.

For the first set of example parameters (ASCII only):

HaZnek7KOGa%2Fk5%2Bf6Q1nw8lzMUpo36mRVvvLHCMUCXxlmdQQGZge1luAUKnleD%2FDYeD19YrqzeHbb6xU3MkSIXKhAO1MaYq48uGVYb3vJScEZVOutgMInrZzUcCWNulNkfcbmExSiymCZ5xQBw5QDuzpuDFqRZ1Xt%2BBZxEHBN9OYQKpoe0%2BovjnXyVOaH8VUKhE%2FghUWnThrXJr%2BhmSc5t7ggjiVPQc7pGn3qSNGCQwdpkQC9GHMr%2Fr%2B8n6qeEKMYB5j%2F1wC4d8Jae8FQiU8xcXR0NlUgV2LAw61%2FZJv5BTJpa%2Bz5Lv1W9v6jHQWRX2O8uaG3KU%2FlR3spR7%2BoGlWOw%3D

For the second set of example parameters (some non-ASCII characters):

qJtv66wyp%2F1mZE%2BmIFAAMUoTe8xkmLN7%2FeAZjuC9x1ocxovItHLl%2FsNK7Wq8QjgiHqGn0bb8P7yVvGBEd1gFe71NQ8aM0M%2BJNIMz5UFxfeA53rXjFlvsyH1Sig%2BOuO9Nz5nhCaJ6bEfj2iuv7w27pB3L8MVqmoCi6D9C%2FQMiLxtPaR70CxtnvoOlIgPmpv2bQy029A31NEK19ieVLkoyp1EUkXRaX3v0mohx8yMnUG1dhX9nUg3Oy8TYZ03DQy7kHDGkMKisNX7rt%2FGuGx1HIgjFclDGLsbAFIodvSLjm9FbseasMELoxlAJDlwRnW8zo5sQmL0Fz7ao935QBynrng%3D%3D

Step 3: Add signature to the request

Complete the request by adding the signature parameter to the query string.

For the first set of example parameters (ASCII only):

curl -H "X-MBX-APIKEY: 4yNzx3yWC5bS6YTwEkSRaC0nRmSQIIStAUOh1b6kqaBrTLIhjCpI5lJH8q8R8WNO" -X POST 'hhttps://testnet.binance.vision/api/v3/order?symbol=BTCUSDT&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000&signature=HaZnek7KOGa%2Fk5%2Bf6Q1nw8lzMUpo36mRVvvLHCMUCXxlmdQQGZge1luAUKnleD%2FDYeD19YrqzeHbb6xU3MkSIXKhAO1MaYq48uGVYb3vJScEZVOutgMInrZzUcCWNulNkfcbmExSiymCZ5xQBw5QDuzpuDFqRZ1Xt%2BBZxEHBN9OYQKpoe0%2BovjnXyVOaH8VUKhE%2FghUWnThrXJr%2BhmSc5t7ggjiVPQc7pGn3qSNGCQwdpkQC9GHMr%2Fr%2B8n6qeEKMYB5j%2F1wC4d8Jae8FQiU8xcXR0NlUgV2LAw61%2FZJv5BTJpa%2Bz5Lv1W9v6jHQWRX2O8uaG3KU%2FlR3spR7%2BoGlWOw%3D'

For the second set of example parameters (some non-ASCII characters):

curl -H "X-MBX-APIKEY: 4yNzx3yWC5bS6YTwEkSRaC0nRmSQIIStAUOh1b6kqaBrTLIhjCpI5lJH8q8R8WNO" -X POST 'https://testnet.binance.vision/api/v3/order?symbol=%EF%BC%91%EF%BC%92%EF%BC%93%EF%BC%94%EF%BC%95%EF%BC%96&&side=SELL&type=LIMIT&timeInForce=GTC&quantity=1&price=0.2&timestamp=1668481559918&recvWindow=5000&signature=qJtv66wyp%2F1mZE%2BmIFAAMUoTe8xkmLN7%2FeAZjuC9x1ocxovItHLl%2FsNK7Wq8QjgiHqGn0bb8P7yVvGBEd1gFe71NQ8aM0M%2BJNIMz5UFxfeA53rXjFlvsyH1Sig%2BOuO9Nz5nhCaJ6bEfj2iuv7w27pB3L8MVqmoCi6D9C%2FQMiLxtPaR70CxtnvoOlIgPmpv2bQy029A31NEK19ieVLkoyp1EUkXRaX3v0mohx8yMnUG1dhX9nUg3Oy8TYZ03DQy7kHDGkMKisNX7rt%2FGuGx1HIgjFclDGLsbAFIodvSLjm9FbseasMELoxlAJDlwRnW8zo5sQmL0Fz7ao935QBynrng%3D%3D'

Here is a sample Python script performing all the steps above:

#!/usr/bin/env python3

import base64
import requests
import time
import urllib.parse
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 = urllib.parse.urlencode(params, encoding='UTF-8')
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://testnet.binance.vision/api/v3/order',
    headers=headers,
    data=params,
)
print(response.json())