Un Cliente

curl "https://api.appsat.net/v1/Clientes/cliente_id/" \
  -H "accept: */*" \
  -H "key: " \
  -H "Content-Type: application/json"

var xhr = new XMLHttpRequest();
xhr.addEventListener('load', function(e) {
  var response = e.target.responseText;
  console.log(response);
});
xhr.addEventListener('error', function(e) {
  console.error('Request errored with status', e.target.status);
});
xhr.open('GET', 'https://api.appsat.net/v1/Clientes/cliente_id/');
xhr.setRequestHeader('accept','*/*');
xhr.setRequestHeader('key','');
xhr.setRequestHeader('Content-Type','application/json');
xhr.send();

import requests

url = 'https://api.appsat.net/v1/Clientes/cliente_id/'
headers = {'accept': '*/*','key': '','Content-Type': 'application/json'}

req = requests.get(url, headers=headers)

print(req.status_code)
print(req.headers)
print(req.text)

#include <stdio.h>
#include <curl/curl.h>

int main(void)
{
    CURL *curl;
    CURLcode res;

    curl = curl_easy_init();
    curl_easy_setopt(curl, CURLOPT_URL, "https://api.appsat.net/v1/Clientes/cliente_id/");
    curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
    /* if redirected, tell libcurl to follow redirection */
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);

    struct curl_slist *headers = NULL;
    headers = curl_slist_append(headers, "accept: */*");
    headers = curl_slist_append(headers, "key: value");
    headers = curl_slist_append(headers, "Content-Type: application/json");
    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

    /* Perform the request, res will get the return code */
    res = curl_easy_perform(curl);
    if (res != CURLE_OK) {
        fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
    }
    /* Clean up after yourself */
    curl_easy_cleanup(curl);
    return 0;
}
/* See: http://stackoverflow.com/a/2329792/1127848 of how to read data from the response. */

URL url = new URL("https://api.appsat.net/v1/Clientes/cliente_id/");
HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
con.setRequestMethod("GET");
con.setRequestProperty("accept", "*/*");
con.setRequestProperty("key", "value");
con.setRequestProperty("Content-Type", "application/json");

int status = con.getResponseCode();
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer content = new StringBuffer();
while((inputLine = in.readLine()) != null) {
    content.append(inputLine);
}
in.close();
con.disconnect();
System.out.println("Response status: " + status);
System.out.println(content.toString());

[
    {
        "cliente_id": 1,
        "empresa_id": 1,
        "sucursal_id": 1,
        "forma_de_pago_id": 0,
        "regimen_de_impuesto_id": 1,
        "cliente_numero": "00000001",
        "cliente_razon_social": "CLIENTE 1",
        "cliente_nombre_comercial": "CLIENTE 1",
        "cliente_nif": "88888888",
        "cliente_dias_de_pago_opcion_1": "",
        "cliente_dias_de_pago_opcion_2": "",
        "cliente_dias_de_pago_opcion_3": "",
        "cliente_iso_code_default": "es",
        "cliente_fecha_add": "2022-12-22 10:10:21",
        "cliente_fecha_upd": "2023-03-16 10:34:32",
        "cliente_delete": 0,
        "cliente_retencion": "",
        "grupo_de_cliente_id": 1,
        "cliente_norma_sepa_esquema": "",
        "cliente_fecha_firma_orden_sepa": "0000-00-00",
        "cliente_referencia_orden_domiciliacion": "",
        "cliente_retencion_dias": 0,
        "cliente_custom_id": "",
        "cliente_abonado": "",
        "cliente_canal_id": 0,
        "cliente_bloqueado": 0,
        "cliente_observaciones": ""
    }
]