description Custom GraphQL Schema Layer (Self-Hosted) Overview
Building a completely custom GraphQL layer on a service like Node.js/Express allows for 100% control over data fetching and business logic. This is the most powerful but also the most time-consuming route. It requires building custom resolvers for every piece of data needed from Shopify, CMS, etc.
help Custom GraphQL Schema Layer (Self-Hosted) FAQ
Why put a custom GraphQL layer in front of Shopify's Storefront API?
A self-hosted layer can combine Shopify data with inventory, search, pricing, or account systems behind one schema. It also keeps private service credentials and business rules on the server rather than exposing them to a browser.
Can an Express GraphQL server bypass Shopify API limits?
No. The layer can cache responses, batch requests, and reduce duplicate work, but calls to Shopify remain subject to Shopify's API limits and access rules.
How do Shopify schema changes affect custom resolvers?
Shopify versions its GraphQL APIs, so the upstream version should be pinned and upgraded deliberately. Resolver tests should catch renamed or removed fields before an older API version reaches the end of its support window.
Should checkout be implemented inside the custom schema?
The schema can create and manage carts through Shopify's Storefront API, but payment handling should continue through Shopify's supported checkout flow. Reimplementing card processing would add major security and PCI-compliance responsibilities.
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