curl -X POST 'https://verification.didit.me/v3/billing/top-up/' \
  -H 'x-api-key: YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "amount_in_dollars": 500,
    "success_url": "https://yourapp.com/billing/success",
    "cancel_url": "https://yourapp.com/billing/cancel"
  }'

import os

import requests

resp = requests.post(
    'https://verification.didit.me/v3/billing/top-up/',
    headers={
        'x-api-key': os.environ['DIDIT_API_KEY'],
        'Content-Type': 'application/json',
    },
    json={
        'amount_in_dollars': 500,
        'success_url': 'https://yourapp.com/billing/success',
        'cancel_url': 'https://yourapp.com/billing/cancel',
    },
    timeout=10,
)
resp.raise_for_status()
session = resp.json()
print('Redirect customer to:', session['checkout_session_url'])

const resp = await fetch('https://verification.didit.me/v3/billing/top-up/', {
  method: 'POST',
  headers: {
    'x-api-key': process.env.DIDIT_API_KEY,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    amount_in_dollars: 500,
    success_url: 'https://yourapp.com/billing/success',
    cancel_url: 'https://yourapp.com/billing/cancel',
  }),
});
if (!resp.ok) throw new Error(`Top-up failed: ${resp.status}`);
const { checkout_session_url } = await resp.json();
window.location.assign(checkout_session_url);

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://verification.didit.me/v3/billing/top-up/",
  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([
    'amount_in_dollars' => 50
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($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://verification.didit.me/v3/billing/top-up/"

	payload := strings.NewReader("{\n  \"amount_in_dollars\": 50\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	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://verification.didit.me/v3/billing/top-up/")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount_in_dollars\": 50\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://verification.didit.me/v3/billing/top-up/")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amount_in_dollars\": 50\n}"

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