Shopify Storefront API Examples for Custom Storefronts

The Shopify Storefront API is a public-facing GraphQL API that lets developers query products, manage carts, and trigger checkout flows from any frontend environment, independent of Shopify's default theme layer. These shopify storefront api examples cover the most common developer needs in 2026: fetching product data, filtering variants, building cart mutations, handling pagination, and diagnosing CORS errors. The API is framework-agnostic by design, meaning you can use it with Next.js, Nuxt, SvelteKit, or Shopify's own Hydrogen framework without changing the underlying query structure.

1. Fetching product listings with GraphQL queries

Product data fetching is the most common entry point for any Storefront API integration, and the query structure differs depending on whether you are building a headless frontend or a checkout extension. For headless frontends, requests target the store's GraphQL endpoint with a "X-Shopify-Storefront-Access-Token` header and a JSON body containing your GraphQL query. A basic product listing query looks like this: