First of all, you need to decide whether to use a JWT token or an API key for authentication. We will help with these questions in the authentication guide.

Header settings with JWT token

Header	Value	Description
accept	application/json	The client expects response data as JSON.
content-type	application/json	The client sends data as JSON in the request body.
authorization	"Bearer ${JWT_token}"	Generated a JWT token via the "Login" endpoint.
merchant_id	"YOUR_MERCHANT_ID"	You have gotten your `merchant_id` with your login and password. (only for the ”Login” endpoint.)

Header settings with API key

Header	Value	Description
accept	application/json	The client expects response data as JSON.
content-type	application/json	The client sends data as JSON in the request body.
api-key	"YOU_API_KEY"	A single API keys string to authenticate.

Example. Get subaccount balance

const url = BASE_URL;
const path = "/v2/balance";

const body = {
  "assets": [
    "BTC"
  ],
  "walletId": "1f44b1c7-9fd4-4d20-b9a4-7aca3646d0d5"
};

const options = {
  method: "POST",
  headers: {
    accept: "application/json",
    "Content-Type": "application/json",
    "Authorization": `Bearer ${data.accessToken}` // data.accessToken - generated a JWT token via /v2/auth/login.
    // Instead of "Authorization" you can use "Api-key":
    // "Api-key": "YOUR_API_KEY"
  },
  body: JSON.stringify(body),
};

fetch(url + path, options)
  .then((response) => response.json())
  .then((showResponse) => console.log(showResponse.data));

import requests

url = BASE_URL
path = "/v2/balance"
headers = {
    "accept": "application/json",
    "Content-Type": "application/json",
    "Authorization": "Bearer " + data.accessToken # data.accessToken - generated a JWT token via /v2/auth/login.
    # Instead of "Authorization" you can use "Api-key":
    # "Api-key": "YOUR_API_KEY"
}
body = {
  "assets": [
    "BTC"
  ],
  "walletId": "1f44b1c7-9fd4-4d20-b9a4-7aca3646d0d5"
};

request = requests.post(url + path, headers=headers, json=body)
print(request.json())

Example. Crypto withdraw operation

const url = BASE_URL;
const path = "/v2/withdraw/crypto";

const body = {
    "paymentMethodCode": "BTC",
    "amount": "0.34",
    "walletId": "1f44b1c7-9fd4-4d20-b9a4-7aca3646d0d5",
    "externalId": "withdrawal-001",
    "callbackUrl": "https://webhook.site/c5067c6d-c6a8-454f-8ebe-17459591b6dc"
};

const options = {
  method: "POST",
  headers: {
    accept: "application/json",
    "Content-Type": "application/json",
    "Authorization": `Bearer ${data.accessToken}` // Generated a JWT token via /v2/auth/login.
    // Instead of "Authorization" you can use "Api-key":
    // "Api-key": "YOUR_API_KEY"
  },
  body: JSON.stringify(body),
};

fetch(url + path, options)
  .then((response) => response.json())
  .then((showResponse) => console.log(showResponse.data));

import requests

url = BASE_URL
path = "/v2/withdraw/crypto"
headers = {
    "accept": "application/json",
    "Content-Type": "application/json",
    "Authorization": "Bearer " + data.accessToken # data.accessToken - generated a JWT token via /v2/auth/login.
    # Instead of "Authorization" you can use "Api-key":
    # "Api-key": "YOUR_API_KEY"
}
body = {
    "paymentMethodCode": "BTC",
    "amount": "0.34",
    "walletId": "1f44b1c7-9fd4-4d20-b9a4-7aca3646d0d5",
    "externalId": "withdrawal-001",
    "callbackUrl": "https://webhook.site/c5067c6d-c6a8-454f-8ebe-17459591b6dc"
};

request = requests.post(url + path, headers=headers, json=body)
print(request.json())