PHP

<?php
$payload = [
    "subject" => "Hello from Mailtarget",
    "from" => [
        "email" => "you@your-verified-domain.com",
        "name" => "Your Name",
    ],
    "to" => [
        ["email" => "recipient@example.com"],
    ],
    "bodyText" => "If you can read this, the integration works.",
];

$ch = curl_init("https://transmission.mailtarget.co/v1/layang/transmissions");
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        "Authorization: Bearer " . getenv("MAILTARGET_API_KEY"),
        "Content-Type: application/json",
    ],
    CURLOPT_POSTFIELDS => json_encode($payload),
]);

$response = curl_exec($ch);
$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo $status . PHP_EOL;
echo $response . PHP_EOL;