curl --request POST \
  --url https://api.zenskar.com/invoices/{invoice_id}/credit_note \
  --header 'Content-Type: application/json' \
  --header 'organisation: <api-key>' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "credit_note_amount": 123,
  "reason": "<string>",
  "refund_amount_split": [
    {
      "payment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "amount": 123,
      "refund_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    }
  ]
}
'

import requests

url = "https://api.zenskar.com/invoices/{invoice_id}/credit_note"

payload = {
    "credit_note_amount": 123,
    "reason": "<string>",
    "refund_amount_split": [
        {
            "payment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "amount": 123,
            "refund_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
        }
    ]
}
headers = {
    "x-api-key": "<api-key>",
    "organisation": "<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>',
    organisation: '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    credit_note_amount: 123,
    reason: '<string>',
    refund_amount_split: [
      {
        payment_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
        amount: 123,
        refund_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a'
      }
    ]
  })
};

fetch('https://api.zenskar.com/invoices/{invoice_id}/credit_note', 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.zenskar.com/invoices/{invoice_id}/credit_note",
  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([
    'credit_note_amount' => 123,
    'reason' => '<string>',
    'refund_amount_split' => [
        [
                'payment_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
                'amount' => 123,
                'refund_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "organisation: <api-key>",
    "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.zenskar.com/invoices/{invoice_id}/credit_note"

	payload := strings.NewReader("{\n  \"credit_note_amount\": 123,\n  \"reason\": \"<string>\",\n  \"refund_amount_split\": [\n    {\n      \"payment_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n      \"amount\": 123,\n      \"refund_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n    }\n  ]\n}")

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

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("organisation", "<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.zenskar.com/invoices/{invoice_id}/credit_note")
  .header("x-api-key", "<api-key>")
  .header("organisation", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"credit_note_amount\": 123,\n  \"reason\": \"<string>\",\n  \"refund_amount_split\": [\n    {\n      \"payment_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n      \"amount\": 123,\n      \"refund_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.zenskar.com/invoices/{invoice_id}/credit_note")

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["organisation"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"credit_note_amount\": 123,\n  \"reason\": \"<string>\",\n  \"refund_amount_split\": [\n    {\n      \"payment_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n      \"amount\": 123,\n      \"refund_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n    }\n  ]\n}"

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

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "amount": 123,
  "currency": "<string>",
  "customer_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "status": "in_progress",
  "repayment_method": "credits",
  "line_items_url": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "credits_returned": 123,
  "customer": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>",
    "email": "<string>",
    "external_id": "<string>"
  },
  "invoice": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>",
    "email": "<string>",
    "external_id": "<string>"
  },
  "invoice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "custom_data": {},
  "credit_note_number": "<string>"
}

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