Magento – Bulk add products in Magento using SOAP API V2

I'm not sure if this is what you need, but here is a simple extension that allows you to get the product url.
The main idea is to rewrite the info method in the product api model and make it return the url of the product also.
For this you will need the following files:
app/etc/modules/[Namespace]_[Module].xml - the declaration file

<?xml version="1.0"?>
<config>
    <modules>
        <[Namespace]_[Module]>
            <active>true</active>
            <codePool>local</codePool>
            <depends>
                <Mage_Catalog />
                <Mage_Api />
            </depends>
        </[Namespace]_[Module]>
    </modules>
</config>

app/code/local/[Namespace]/[Module]/etc/config.xml - the configuration file

<?xml version="1.0"?>
<config>
    <modules>
        <[Namespace]_[Module]>
            <version>0.0.1</version>
        </[Namespace]_[Module]>
    </modules>
    <global>
        <models>
            <catalog>
                <rewrite>
                    <product_api>[Namespace]_[Module]_Model_Product_Api</product_api>
                </rewrite>
            </catalog>
        </models>
    </global>
</config>

app/code/local/[Namespace]/[Module]/Model/Product/Api.php - your new class

<?php
class [Namespace]_[Module]_Model_Product_Api extends Mage_Catalog_Model_Product_Api {
    public function info($productId, $store = null, $attributes = null, $identifierType = null){
        $product = $this->_getProduct($productId, $store, $identifierType);
        $result = parent::info($productId, $store = null, $attributes = null, $identifierType = null);
        //add a new element in here called product_url. You can even wrap it in some condition to see if the product is assigned to the current website or if the product is enabled or visible. ($product->getWebsiteIds(), $product->getStatus(), $product->getVisibility()). 
        $result['product_url'] = $product->getUrlInStore($store);
        return $result;
    }
}

Note: This works only for API V1. In order to make it work for v2 you need to add a wsdl to your module. See how you can do it.

For add to cart of configurable product,you need to super attribute value. in my below if only one super attribute so in super_attribute i have set one value

$quoteId = $client->call( $session, 'cart.create',array( 'default' ));
$arrProducts = array(
    array(
        "product_id" =>"21",
        "qty" => 2,
                "super_attribute" => array(         
                    92 => 162

                 )
    )

);



$resultCartProductAdd = $client->call(
    $sessionId,
    "cart_product.add",
    array(
        $quoteId,
        $arrProducts
    )
);

here 92 is attribute id and 162 it option id if you have more then one variance for then

"super_attribute" => array(         
                    first_attribute_id => first_chose_option_value
                     seocnd_attribute_id => seocnd_chose_option_value.
                     .....



                 )