Autenticación

curl --location 'https://apisandbox.facturama.mx/Client' \
--header 'Authorization: Basic dHVfdXN1YXJpbzp0dV9jb250cmFzZcOxYQ=='

import requests
import base64

usuario = "tu_usuario"
password = "tu_contraseña"
credentials = base64.b64encode(f"{usuario}:{password}".encode()).decode()

headers = {
    "Authorization": f"Basic {credentials}",
    "Content-Type": "application/json"
}

response = requests.get(
    "https://apisandbox.facturama.mx/client",
    headers=headers
)
print(response.json())

<?php
$usuario = "tu_usuario";
$password = "tu_contraseña";
$credentials = base64_encode("$usuario:$password");

$ch = curl_init("https://apisandbox.facturama.mx/clients");
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Authorization: Basic $credentials",
    "Content-Type: application/json"
]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
echo $response;

const axios = require('axios');

const usuario = 'tu_usuario';
const password = 'tu_contraseña';
const credentials = Buffer.from(`${usuario}:${password}`).toString('base64');

axios.get('https://apisandbox.facturama.mx/clients', {
  headers: {
    Authorization: `Basic ${credentials}`,
    'Content-Type': 'application/json'
  }
}).then(res => console.log(res.data));

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {

    public static void main(String[] args)
            throws IOException, InterruptedException {

        HttpClient client = HttpClient.newHttpClient();

        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(
                    "https://apisandbox.facturama.mx/Client"
                ))
                .header(
                    "Authorization",
                    "Basic dHVfdXN1YXJpbzp0dV9jb250cmFzZcOxYQ=="
                )
                .GET()
                .build();

        HttpResponse<String> response = client.send(
                request,
                HttpResponse.BodyHandlers.ofString()
        );

        System.out.println("Status: " + response.statusCode());
        System.out.println(response.body());
    }
}

require 'net/http'
require 'uri'

url = URI.parse(
  'https://apisandbox.facturama.mx/Client'
)

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

request = Net::HTTP::Get.new(url.request_uri)

request['Authorization'] =
  'Basic dHVfdXN1YXJpbzp0dV9jb250cmFzZcOxYQ=='

response = http.request(request)

puts "Status: #{response.code}"
puts response.body

using System;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main()
    {
        using var client = new HttpClient();

        client.DefaultRequestHeaders.Add(
            "Authorization",
            "Basic dHVfdXN1YXJpbzp0dV9jb250cmFzZcOxYQ=="
        );

        var response = await client.GetAsync(
            "https://apisandbox.facturama.mx/Client"
        );

        var content = await response.Content.ReadAsStringAsync();

        Console.WriteLine($"Status: {(int)response.StatusCode}");
        Console.WriteLine(content);
    }
}

echo -n "usuario:contraseña" | base64
# Resultado: ddHVfdXN1YXJpbzp0dV9jb250cmFzZcOxYQ==

[Convert]::ToBase64String([Text.Encoding]::UTF8.GetBytes("usuario:contraseña"))
# Resultado: ddHVfdXN1YXJpbzp0dV9jb250cmFzZcOxYQ==