•19 min read
Headless Shopify with Next.js: Complete Build Guide (Step-by-Step 2026)
A practical guide to building a production headless Shopify storefront on Next.js App Router. Covers Shopify's three API tiers, typed GraphQL codegen data layer, generateStaticParams + ISR catalog architecture, Cart API cookie mechanics, Customer Account API OAuth flow, SEO engineering for variant URLs, and performance boundary placement - with references from production global eCommerce engagements.
- Shopify
- Next.js
- Headless
- eCommerce
- Architecture
- Engineering