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Magento 2: Get All Product and Stock details using Rest APIs

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While Magento 2 already has a proper documentation of their latest REST API collection, but we still have some requirements which needs some customization. Like- how to get all product details with stock using Magento 2 REST APIs?

Many of you may have already googled and probably found this API rest/V1/products?searchCriteria[page_size]=20 . But does this meets the requirements?

No. It returns all the related data but stock details.

“Magento2 does not suggest to add stock info to listing API a MSI add to 2.3 version.“

So, how do we get the stock details using Magento 2 REST APIs?

Let’s find out-

1.Create di.xml at your app/code/Vendor/Module/etc

We are going to update ExtensionPool data of Magento\Catalog\Api\Data\ProductInterface

<?xml version="1.0" encoding="UTF-8"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Framework\EntityManager\Operation\ExtensionPool">
        <arguments>
            <argument name="extensionActions" xsi:type="array">
                <item name="Magento\Catalog\Api\Data\ProductInterface" xsi:type="array">
                    <item name="read" xsi:type="array">
                        <item name="stock_item" xsi:type="string">Vendor\Module\Model\ReadHandler</item>
                    </item>
                </item>
            </argument>
        </arguments>
    </type>
</config>

2. Define ReadHandler class.

<?php

namespace Vendor\Module\Model;


class ReadHandler implements \Magento\Framework\EntityManager\Operation\ExtensionInterface
{

    /**
     * @var \Magento\CatalogInventory\Api\StockRegistryInterface
     */
    private $stockRegistry;

    public function __construct(
    \Magento\CatalogInventory\Api\StockRegistryInterface $stockRegistry     
    ) {

        $this->stockRegistry = $stockRegistry;
    }
    /**
     * Magento\CatalogInventory\Api\Data\StockItemInterface
     * @param type $product
     * @param type $arguments
     */
    public function execute($product, $arguments = [])
    {
        if ($product->getExtensionAttributes()->getStockItem() !== null) {
            return $product;
        }
        // echo "piddd-".$product->getId();
        $stockItem =$this->stockRegistry->getStockItem($product->getId());
        
        $extensionAttributes = $product->getExtensionAttributes();
        // echo "<pre>";
        // var_dump($extensionAttributes->getData());
        // die;
        $extensionAttributes->setStockItem($stockItem);
        $product->getExtensionAttributes()->setStockItem($stockItem);

        return $product;        
    }

}

That’s it.

Enable this module and start using your extended Magento 2 REST API. It should return the results like below image.

API endpoint: rest/V1/products?searchCriteria[page_size]=20

Response:

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