How to Combine Medusa.js and a Headless CMS for a Smarter Next.js Storefront

Developers building e-commerce storefronts with Medusa.js and Next.js often face a challenge when marketing teams need editorial content like buying guides, landing pages, and FAQs alongside commerce data. The recommended approach is to keep Medusa as the single source of truth for commerce data — including products, pricing, inventory, and orders — while routing all editorial content through a separate headless CMS. The two systems are joined at read time in the Next.js layer using a shared key, such as a product handle, rather than duplicating data between platforms. Storing marketing copy inside Medusa's metadata field is discouraged because it lacks rich-text editing, content modeling, and revision history for non-technical teams. A key rule enforced during code review is that price and inventory must always be fetched live from Medusa, never sourced from the CMS, to avoid mismatches at checkout.