Filter Webservice Products Gento

Question

Hello, I’m working on a webservice that lists all products from my store and would like to set a filter that returns only products that have Qtde in stock, how can I do this?

below are my codes of how I’m doing :

$sessionId = $client->login('username','api_key');  
$funcoes = $client->resources($sessionId);
$result = $client->call($sessionId, 'catalog_product.list');

I need some filter to return only the products they have in stock, thank you.