$ composer require guzzlehttp/guzzle

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('DELETE', 'https://api-test.ticketbaiws.eus/lroe-critcaja-pagos/', [
  'body' => '{"ejercicio": 2023,"pagos": [{"nombre_social": "Berein Internet S.L.","nif": "B01489350","fecha_factura": "29\/11\/2023","fecha_pago": "30\/12\/2023","serie": "A","num_factura": "2023000699","importe_pagado": 100}]}',
  'headers' => [
    'Accept' => 'application/json',
    'Content-Type' => 'application/json',
    'Token' => 'xxx',
    'Nif' => '00000014Z'
  ],
]);

echo $response->getBody();

$ python -m pip install requests

import requests

url = "https://api-test.ticketbaiws.eus/lroe-critcaja-pagos/"
payload = {
    "ejercicio": 2023,
    "pagos": [
        {
            "nombre_social": "Berein Internet S.L.",
            "nif": "B01489350",
            "fecha_factura": "29\/11\/2023",
            "fecha_pago": "30\/12\/2023",
            "serie": "A",
            "num_factura": "2023000699",
            "importe_pagado": 100
        }
    ]
}

headers = {"Accept": "application/json", "Token" : "xxx", "Nif" : "00000014Z"}
response = requests.request("DELETE", url, json=payload, headers=headers)

print(response.text)

CURL *hnd = curl_easy_init();

curl_easy_setopt(hnd, CURLOPT_CUSTOMREQUEST, "DELETE");
curl_easy_setopt(hnd, CURLOPT_URL, "https://api-test.ticketbaiws.eus/lroe-critcaja-pagos/");

struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "Accept: application/json");
curl_easy_setopt(hnd, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(hnd, CURLOPT_delFIELDS, '{"ejercicio": 2023,"pagos": [{"nombre_social": "Berein Internet S.L.","nif": "B01489350","fecha_factura": "29\/11\/2023","fecha_pago": "30\/12\/2023","serie": "A","num_factura": "2023000699","importe_pagado": 100}]}');

CURLcode ret = curl_easy_perform(hnd);

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, '{"ejercicio": 2023,"pagos": [{"nombre_social": "Berein Internet S.L.","nif": "B01489350","fecha_factura": "29\/11\/2023","fecha_pago": "30\/12\/2023","serie": "A","num_factura": "2023000699","importe_pagado": 100}]}');

Request request = new Request.Builder()
  .url("https://api-test.ticketbaiws.eus/lroe-critcaja-pagos/")
  .DELETE(body)
  .addHeader("Accept", "application/json")
  .addHeader("Token", "xxx")
  .addHeader("Nif", "00000014Z")
  .build();
  
Response response = client.newCall(request).execute();