A simple PHP script that allows you to add multiple recipients in a NL list using the API.

NLAPI1.php

<?php
$email = array('[email protected]','[email protected]');
$name = array('andrei1','andrei2');

for($i=0;$i<count($email);$i++)
{
   $data[] = json_encode(array('email' => $email[$i], 'name' => $name[$i]));
}

$url = 'http://sendgrid.com/';

$user = 'username';
$pass = 'password';

print_r($data);

$listname = 'listname';

for($i=0;$i<count($data);$i++){
$params = array(
          'api_user' => $user,
          'api_key' => $pass,
          'list' => $listname,
          'data' => $data[$i]
           );

$request = $url.'api/newsletter/lists/email/add.json';
$session = curl_init($request);

curl_setopt ($session, CURLOPT_POST, true);
curl_setopt ($session, CURLOPT_POSTFIELDS, $params);
curl_setopt($session, CURLOPT_HEADER, false);
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
 
$response = curl_exec($session);
curl_close($session);
 
print_r($response);
}
?>