In Magento 2, You can update already existing product using REST API. You need to call update product request url for perform update action.
For Update Product, you need to call PUT method as action Type.
Request URL: <YOUR_SITE_URL>/rest/V1/products/<SKU>
ReplaceYOUR_SITE_URL with actual site URL and SKU with your product SKU which you want to update data.
Continue reading “How to Update product using REST API magento 2?”
For Access Magento 2 REST API, you need to first generate an access token. Access token used for synchronization with Magento to other third-party platforms. Check the link for Generate Access Token Magento 2
Once you got the Access Token for Magento, You can call REST API for creating a product from a third-party system.
Continue reading “Create product using REST API programmatically in magento 2.”