You can fetch product stock-related data like Qty, status, manage stock by REST API V1/stockItems/:SKU
URL: <BASE_URL>/rest/V1/stockItems/:SKU (https://magento246.test/rest/V1/stockItems/MySku)
Header: Authorization:Bearer <ADMIN_TOKEN> Continue reading “How to get Product Stock Item by REST API V1/stockItems/:SKU Magento 2?”