Headless Commerce

Headless commerce decouples the frontend (storefront) from the commerce backend (catalog, cart, checkout, OMS) by mediating the relationship through APIs and webhooks. Instead of using the storefront templates a platform provides, the merchant builds a custom frontend (typically Next.js, Nuxt, Astro, or a native mobile app) and calls the platform's APIs to drive it. The pattern emerged because commerce platforms designed their templating systems for general use, which makes deeply custom UX (immersive product configurators, interactive content commerce, complex B2B quoting) hard to build without fighting the platform's conventions. Headless removes that constraint: any frontend that can call HTTPS APIs becomes a viable storefront. The trade-offs are substantial. Pros: complete UX control, faster page-speed optimization, omnichannel delivery from one backend, easier A/B testing of structural changes, no template-system lock-in. Cons: significantly higher upfront engineering investment (a templated Shopify storefront is hours to launch; a headless one is months), ongoing maintenance burden, loss of the platform's native admin features for content (forces a separate CMS), and integration complexity for plug-and-play apps. For margin governance specifically, headless makes the integration story simpler in one way and harder in another. Simpler: the storefront is custom code, so any pre-checkout enforcement (margin floor checks, MAP enforcement, velocity caps) can be implemented as just-another-API call. Harder: the merchant must implement those checks rather than getting them from a platform-native extension. Profit-firewall integrations like Agentis address this gap by providing a single API contract that headless storefronts call before order-confirmation, regardless of which commerce platform sits behind. Headless and composable commerce are often deployed together but are distinct concepts: headless is about the frontend-backend contract; composable is about backend service decomposition.