service_calls.xml for Magento 2

service_calls.xml

<service_calls>
    <service_call name="selectedProductDetails" service="Mage_Catalog_Service_Product" method="item">
        <arg name="productId">{{request.params.id}}</arg>
    </service_call>

    <service_call name="selectedProductOptions" service="Mage_Catalog_Service_Product" method="getOptions">
        <arg name="productId">{{request.params.id}}</arg>
    </service_call>


    <service_call name="relatedProducts" service="Mage_Catalog_Service_Product" method="getRelatedProducts">
        <arg name="productId">{{request.params.id}}</arg>
    </service_call>
</service_calls>