Create a .gitignore file and add .env to exclude it from version control.
.env
For all examples, we will use the synchronous requests library. Let's import it:
import requests
Public endpoints
For public endpoints, simply send a GET request.
No API keys are required.
Example
# https://docs.backpack.exchange/#tag/Markets/operation/get_open_interest
BASE_URL: str = "https://api.backpack.exchange/" # base api url for all endpoints
symbol: str = "SOL_USDC_PERP" # let's specify the symbol
result_url: str = f"{BASE_URL}api/v1/openInterest?symbol={symbol}" # add your argument as a query string. For GET requests you need only query string
from json import JSONDecodeError
response = requests.get(url=result_url) # make a get request
print(f"response status code: {response}")
if response.status_code == 200:
# make your code safe in case you receive unexpected data
try:
print(f"response json: {response.json()}")
open_interest: str = response.json()[0]["openInterest"]
print(f"open interest: {open_interest}")
except JSONDecodeError:
print(f"response text if response isn't json: {response.text}")
else:
...
response status code: <Response [200]>
response json: [{'openInterest': '81420.17', 'symbol': 'SOL_USDC_PERP', 'timestamp': 1743731167028}]
open interest: 81420.17
If you have more than one argument, join them using the & symbol.
Private endpoints
For private endpoints we need to create spesific headers and a request body (for POST requests)
import base64 # import base64 as "The signature should then be base64 encoded"
from time import time # import time for timestamp
import os # import os – to access environment variables
from cryptography.hazmat.primitives.asymmetric import ed25519 # import ed25519 to create a private key that will sign the message
# from dotenv import load_dotenv, find_dotenv # to create env variables from your .env file
# use this in your code
# load_dotenv(find_dotenv())
# public_key: str = os.getenv("PUBLIC_KEY")
# secret_key: str = os.getenv("SECRET_KEY")
public_key: str = "zDIJj9qneWIY0IYZ5aXoHcNMCm+XDhVcTssiT0HyY0A=" # unsafe!
secret_key: str = "4odxgSUxFrC/zsKWZF4OQwYAgnNu9hnWH3NxWfLAPz4=" # unsafe!
private_key = ed25519.Ed25519PrivateKey.from_private_bytes(
base64.b64decode(secret_key)
)
Let’s retrieve the deposit address.
timestamp = int(time() * 1e3) # Unix time in milliseconds
window: str = "5000" # Time window in milliseconds that the request is valid for. Increase if you have bad connection.
Now that X-Timestamp (timestamp), X-Window (window) and X-API-Key (public_key) are ready. Let's create X-Signature
instruction: str = "depositAddressQuery"
sign_str = f"instruction={instruction}"
# This endpoint requires the "blockchain" parameter
params: dict = {
"blockchain": "Solana",
}
# Generic code to generate a valid query string from any parameters
sorted_params_list = []
for key, value in sorted(params.items()):
if isinstance(value, bool): # boolean variables should be lowercase in query strings
value = str(value).lower()
sorted_params_list.append(f"{key}={value}")
sorted_params = "&".join(sorted_params_list)
if sorted_params:
sign_str += "&" + sorted_params
sign_str += f"×tamp={timestamp}&window={window}"
print(sign_str)
