Envio em lotes via PHP

envio.php

<?php

$config = [
    'apiv2' => 'http://v2.bestuse.com.br/api/v1/'
];

function makeRequest($url, $jsonData, $method) {
    //Initiate cURL.
    $ch = curl_init($url);

    //Encode the array into JSON.
    $jsonDataEncoded = json_encode($jsonData);

    //Tell cURL that we want to send a POST request.
    if ($method === 'POST') {
        curl_setopt($ch, CURLOPT_POST, 1);
        //Attach our encoded JSON string to the POST fields.
        curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataEncoded);
    }

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    //Set the content type to application/json
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));

    //Execute the request
    $retornos = curl_exec($ch);

    $retornos = json_decode($retornos, 1);

    return $retornos;
}

function envioLote($token, $carteira, $lote) {
    $url = $config['apiv2'].'envioApi?token='.$token;

    $dados = [
        'smss' => $lote,
        'centroCusto' => $carteira,
        'envioImediato' => true
    ];

    $response = makeRequest($url, $dados, 'POST');

    return json_encode($response);
}

$token = 'eyJhbGciOiJIUzI1NiJ9.NWEwMGIzNNWMyMTI1ZmUwYjYzMjE3.Wti1ZgrYI7Wo81iWJW7jy5nE8OyvJHCeTxgl1n5fqKs';
$carteira = '5a00b37ab5c2145fe0b63221';

$lote = [
  array('numero' => '42999999999', 'mensagem' => 'Mensagem'),
  array('numero' => '42999999999', 'mensagem' => 'Mensagem2')
],

$envio = envioLote($token, $carteira, $lote);
print_r($envio);