curl --request POST \
  --url https://api.manexx.com/api/v1/external/invoices \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "external_id": "order-4821",
  "customer_id": "user-99",
  "amount": "1050.00",
  "currency": "UAH",
  "purpose": "Order #4821",
  "callback_url": "https://shop.example/webhooks/manexx",
  "success_url": "https://shop.example/paid",
  "fail_url": "https://shop.example/failed"
}
'

import requests

url = "https://api.manexx.com/api/v1/external/invoices"

payload = {
    "external_id": "order-4821",
    "customer_id": "user-99",
    "amount": "1050.00",
    "currency": "UAH",
    "purpose": "Order #4821",
    "callback_url": "https://shop.example/webhooks/manexx",
    "success_url": "https://shop.example/paid",
    "fail_url": "https://shop.example/failed"
}
headers = {
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    external_id: 'order-4821',
    customer_id: 'user-99',
    amount: '1050.00',
    currency: 'UAH',
    purpose: 'Order #4821',
    callback_url: 'https://shop.example/webhooks/manexx',
    success_url: 'https://shop.example/paid',
    fail_url: 'https://shop.example/failed'
  })
};

fetch('https://api.manexx.com/api/v1/external/invoices', 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.manexx.com/api/v1/external/invoices",
  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([
    'external_id' => 'order-4821',
    'customer_id' => 'user-99',
    'amount' => '1050.00',
    'currency' => 'UAH',
    'purpose' => 'Order #4821',
    'callback_url' => 'https://shop.example/webhooks/manexx',
    'success_url' => 'https://shop.example/paid',
    'fail_url' => 'https://shop.example/failed'
  ]),
  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://api.manexx.com/api/v1/external/invoices"

	payload := strings.NewReader("{\n  \"external_id\": \"order-4821\",\n  \"customer_id\": \"user-99\",\n  \"amount\": \"1050.00\",\n  \"currency\": \"UAH\",\n  \"purpose\": \"Order #4821\",\n  \"callback_url\": \"https://shop.example/webhooks/manexx\",\n  \"success_url\": \"https://shop.example/paid\",\n  \"fail_url\": \"https://shop.example/failed\"\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://api.manexx.com/api/v1/external/invoices")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"external_id\": \"order-4821\",\n  \"customer_id\": \"user-99\",\n  \"amount\": \"1050.00\",\n  \"currency\": \"UAH\",\n  \"purpose\": \"Order #4821\",\n  \"callback_url\": \"https://shop.example/webhooks/manexx\",\n  \"success_url\": \"https://shop.example/paid\",\n  \"fail_url\": \"https://shop.example/failed\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.manexx.com/api/v1/external/invoices")

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  \"external_id\": \"order-4821\",\n  \"customer_id\": \"user-99\",\n  \"amount\": \"1050.00\",\n  \"currency\": \"UAH\",\n  \"purpose\": \"Order #4821\",\n  \"callback_url\": \"https://shop.example/webhooks/manexx\",\n  \"success_url\": \"https://shop.example/paid\",\n  \"fail_url\": \"https://shop.example/failed\"\n}"

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

{
  "data": {
    "uuid": "9f2c1e5a-3b7d-4e21-a0c9-1f2e3d4c5b6a",
    "external_id": "order-4821",
    "customer_id": "user-99",
    "amount": "1050.00",
    "currency": {
      "id": 1,
      "code": "UAH",
      "name": "Ukrainian hryvnia",
      "symbol": "₴"
    },
    "status": "pending",
    "created_at": "2026-07-16T09:24:11Z",
    "expires_at": "2026-07-16T09:39:11Z",
    "purpose": "Order #4821",
    "amount_to_send": "1071.00",
    "callback_url": "https://shop.example/webhooks/manexx",
    "success_url": "https://shop.example/paid",
    "fail_url": "https://shop.example/failed",
    "payment_url": "https://pay.manexx.com/pay/9f2c1e5a-...?token=..."
  },
  "success": true
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}