Hosted Checkout — Advanced Integration

Pre-Populating Customer Data

$post = array(
    'security_key' => YOUR_PRIVATE_KEY,
    'type'         => 'sale',
    'amount'       => '49.99',
    'firstname'    => 'John',
    'lastname'     => 'Smith',
    'email'        => 'john@example.com',
    'address1'     => '123 Main St',
    'city'         => 'Miami',
    'state'        => 'FL',
    'zip'          => '33101',
    'country'      => 'US',
    'order_id'     => 'ORDER-789',
);

Recurring Billing via Hosted Checkout

$post = array(
    'security_key'    => YOUR_PRIVATE_KEY,
    'type'            => 'sale',
    'amount'          => '9.99',
    'recurring'       => 'add_subscription',
    'plan_payments'   => '0',        // 0 = indefinite
    'plan_amount'     => '9.99',
    'month_frequency' => '1',
    'day_of_month'    => '1',
    'start_date'      => date('Y-m-d', strtotime('+1 month')),
);

Storing to Customer Vault

$post['customer_vault']    = 'add_customer';
$post['customer_vault_id'] = 'CUST-' . $user_id;  // Optional custom ID

Key Notification Response Fields