curl --request POST \
  --url https://api.hel.io/v1/charge/api-key \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "paymentRequestId": "<string>",
  "requestAmount": "<string>",
  "expiresAt": "<string>",
  "successRedirectUrl": "<string>",
  "cancelRedirectUrl": "<string>",
  "prepareRequestBody": {
    "customerDetails": {
      "additionalJSON": "<string>"
    }
  }
}
'

import requests

url = "https://api.hel.io/v1/charge/api-key"

payload = {
    "paymentRequestId": "<string>",
    "requestAmount": "<string>",
    "expiresAt": "<string>",
    "successRedirectUrl": "<string>",
    "cancelRedirectUrl": "<string>",
    "prepareRequestBody": { "customerDetails": { "additionalJSON": "<string>" } }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    paymentRequestId: '<string>',
    requestAmount: '<string>',
    expiresAt: '<string>',
    successRedirectUrl: '<string>',
    cancelRedirectUrl: '<string>',
    prepareRequestBody: {customerDetails: {additionalJSON: '<string>'}}
  })
};

fetch('https://api.hel.io/v1/charge/api-key', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.hel.io/v1/charge/api-key",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'paymentRequestId' => '<string>',
    'requestAmount' => '<string>',
    'expiresAt' => '<string>',
    'successRedirectUrl' => '<string>',
    'cancelRedirectUrl' => '<string>',
    'prepareRequestBody' => [
        'customerDetails' => [
                'additionalJSON' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.hel.io/v1/charge/api-key"

	payload := strings.NewReader("{\n  \"paymentRequestId\": \"<string>\",\n  \"requestAmount\": \"<string>\",\n  \"expiresAt\": \"<string>\",\n  \"successRedirectUrl\": \"<string>\",\n  \"cancelRedirectUrl\": \"<string>\",\n  \"prepareRequestBody\": {\n    \"customerDetails\": {\n      \"additionalJSON\": \"<string>\"\n    }\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.hel.io/v1/charge/api-key")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"paymentRequestId\": \"<string>\",\n  \"requestAmount\": \"<string>\",\n  \"expiresAt\": \"<string>\",\n  \"successRedirectUrl\": \"<string>\",\n  \"cancelRedirectUrl\": \"<string>\",\n  \"prepareRequestBody\": {\n    \"customerDetails\": {\n      \"additionalJSON\": \"<string>\"\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hel.io/v1/charge/api-key")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"paymentRequestId\": \"<string>\",\n  \"requestAmount\": \"<string>\",\n  \"expiresAt\": \"<string>\",\n  \"successRedirectUrl\": \"<string>\",\n  \"cancelRedirectUrl\": \"<string>\",\n  \"prepareRequestBody\": {\n    \"customerDetails\": {\n      \"additionalJSON\": \"<string>\"\n    }\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "id": "68123806f923f09544c5c6a5",
  "pageUrl": "https://app.hel.io/charge/2ac13665-9cfe-4466-b294-05069d57b0a2"
}

{
  "message": "Api key or token is invalid",
  "code": 401
}