для Magento SOAP API V1 вы можете сделать это:
$client = new SoapClient('http://magentohost/api/soap/?wsdl');
// If somestuff requires api authentification,
// then get a session token
$session = $client->login('apiUser', 'apiKey');
$result = $client->call($session, 'product_attribute.info', '11');
var_dump ($result);
// If you don't need the session anymore
//$client->endSession($session);
Вы получите полную информацию о необходимом атрибуте со списком параметров.
Пример ответа:
array
'attribute_id' => string '11' (length=3)
'attribute_code' => string 'new_special_price' (length=17)
'frontend_input' => string 'text' (length=4)
'default_value' => null
'is_unique' => string '0' (length=1)
'is_required' => string '0' (length=1)
'apply_to' =>
array
empty
'is_configurable' => string '0' (length=1)
'is_searchable' => string '0' (length=1)
'is_visible_in_advanced_search' => string '0' (length=1)
'is_comparable' => string '0' (length=1)
'is_used_for_promo_rules' => string '0' (length=1)
'is_visible_on_front' => string '0' (length=1)
'used_in_product_listing' => string '0' (length=1)
'frontend_label' =>
array
0 =>
array
'store_id' => int 0
'label' => string 'special price' (length=13)
1 =>
array
'store_id' => int 2
'label' => string 'special price' (length=13)
'scope' => string 'store' (length=5)
'additional_fields' =>
array
'frontend_class' => null
'is_html_allowed_on_front' => string '1' (length=1)
'used_for_sort_by' => string '0' (length=1)
источник