PHP

//====Setting Begin=============================
$cert = 'API CERT';
$call_name = 'GetDomain';
$param = array('key' => '......');
$uri = 'THE URI';
//====Setting End===============================

$timestamp = time();
$signature = md5($timestamp . $cert);
$header = array(
    'API-NAME: ' . $call_name,
    'API-TIMESTAMP: ' . $timestamp,
    'API-SIGNATURE: ' . $signature
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $uri);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $param);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
curl_close($ch);
print_r(json_decode($result));