curl --request GET \
  --url 'https://doc-api.oppiwallet.com/api/v2/balance/6698aec7f188ae24c673da1c' \
  --header 'signatureToken: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...' \
  --header 'Content-Type: application/json'

const axios = require('axios');

let config = {
  method: 'get',
  maxBodyLength: Infinity,
  url: 'https://doc-api.oppiwallet.com/api/v2/balance/6698aec7f188ae24c673da1c',
  headers: { 
    'signatureToken': 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1cmkiOiJjcmVhdGVUcmFuc2FjdGlvblJlcXVlc3QiLCJpYXQiOjE3MTUxNTM2NTQsImV4cCI6MTcxNTE1MzcwOSwia2V5Ijoicmh0TmJELU9yTFQteFp3M3QtMkpFWnR4Iiwic2lnbmF0dXJlU3RyaW5nIjoiMWVjY2M1NDc0YWZiMzU4NDExNDEzNjBkOGQ0MDBlMWYxOWIzNRjYzVkM2YxNTRjNmQ5YjViNSJ9.JuF7d8Oc4EyMvm7s5g3CN9L9Wbl_TFI_yO8jt20dvHw',
    'Content-Type': 'application/json'
  }
};

axios.request(config)
  .then((response) => {
    console.log(JSON.stringify(response.data));
  })
  .catch((error) => {
    console.log(error);
  });

import requests

currency_id = "6698aec7f188ae24c673da1c"
url = f"https://doc-api.oppiwallet.com/api/v2/balance/{currency_id}"

headers = {
    "signatureToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
    "Content-Type": "application/json"
}

response = requests.get(url, headers=headers)
print(response.json())

package main

import (
	"fmt"
	"net/http"
	"io/ioutil"
)

func main() {
	url := "https://doc-api.oppiwallet.com/api/v2/balance/6698aec7f188ae24c673da1c"

	req, _ := http.NewRequest("GET", url, nil)
	req.Header.Add("signatureToken", "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)
	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(string(body))
}

<?php
$curl = curl_init();

$currencyId = "6698aec7f188ae24c673da1c";

curl_setopt_array($curl, [
  CURLOPT_URL => "https://doc-api.oppiwallet.com/api/v2/balance/{$currencyId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "signatureToken: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
?>

{
  "balance": 0.564333586
}

{
  "message": "Error message"
}

{
  "message": "Currency not found"
}