Something to bear in mind when Doing work with the PrestaShop API is authentication. You will need to make an API essential from the back office and include it in your requests. Without correct authentication, your requests will probably be turned down. Documentation is important. Consistently consult the official reference https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html