The APIs in Magento 2 Vue storefront are based on GraphQL. GraphQL is an API language that provides you with a flexible way to query and retrieve data. There are two main types of APIs in Magento 2 Vuejs storefront. Firste, Public APIs allow developers to access and query Magento 2 storefront data. and Second Private APIs are used by internal components of Magento 2 Vuejs storefront to access and query data. You need to understand the specific API response for Magento 2 storefront to use the API, and if you want to understand this reaction then read our blog.
Visit the link: https://webkul.com/blog/exploring-the-possibilities-of-magento-2-vue-storefront-for-your-ecommerce-business/