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E-commerce

Storefront API

Portrait of Robert Klimant, co-founder of Roelu Studio
Robert KlimantCo-founder

What is Storefront API?

A Storefront API is the public, read-and-write interface an e-commerce platform exposes so external front-ends can pull product data, manage carts, and complete orders. Shopify, BigCommerce, Medusa.js, and commercetools all ship one. It is what makes headless commerce possible: the storefront is built independently and talks to the commerce engine through these endpoints, usually over GraphQL or REST with a public access token.

Why it matters

Without a Storefront API, you are stuck with the platform's themes and templating language — Liquid, Stencil, whatever the vendor ships. Performance is capped at what the theme allows. Design is capped at what the template engine renders. The moment a brand wants a custom hero, a custom cart drawer, a custom filter, you fight the theme. The Storefront API removes the fight. The front-end can be anything — Next.js, Astro, a mobile app, a kiosk. The commerce engine stays the source of truth. Brands stop renting a storefront and start owning one.

How it works

When a shopper lands on a product page, the front-end sends a request to the Storefront API — something like `query { product(handle: "x") { title, price, variants } }` — and the platform returns structured data. The front-end renders that data however the design calls for. Add to cart triggers another API call. Checkout either hands off to the platform's hosted flow or runs through the API itself. Authentication uses a public token scoped to safe operations. Sensitive logic — payment, inventory, fraud — stays on the platform. The front-end never touches credit card data; only the gateway and the platform do.

Related terms

  • Headless Commerce

    E-commerce

    An e-commerce setup where the storefront is built separately from the cart, checkout, and product engine, so the brand controls design and speed without ever…

  • Composable Commerce

    E-commerce

    An e-commerce strategy of picking specialized tools for each job — cart, search, payments, content, analytics — and stitching them together with APIs, instead…

  • BigCommerce

    E-commerce

    A hosted e-commerce platform built for mid-market and enterprise brands, with strong native B2B features, an open Storefront API, and fewer per-transaction…

  • Medusa.js

    E-commerce

    An open-source, headless e-commerce platform that gives brands the commerce engine — cart, products, orders, payments — while leaving the storefront design and…

  • Shopify

    E-commerce

    A hosted e-commerce platform that runs your storefront, payments, and checkout in one subscription — fast to launch, easy to use, and increasingly hard to…

  • Product Information Management

    E-commerce

    A central system that holds every product's data — names, descriptions, images, specs, prices, translations — and pushes it out to every channel that needs it,…

  • Composable Architecture

    Development

    An approach to building websites and digital products where each capability — CMS, search, payments, analytics — is a separate specialized service, connected…