Babylist + Amazon Baby Registry + Target Registry, how deep can the integration go on Magento?

Three layers depending on partnership:

• Babylist API sync, the deepest. Babylist exposes a partner API for “Add to Babylist” buttons on your PDP, registry-import (parent links their Babylist to your store), and gifter-redirect (gifter on Babylist clicks your SKU → lands on your PDP → checks out on your store). Magento module wraps the API, stores Babylist registry IDs on the customer entity, and renders the dashboard. Cuts the Babylist commission from ~20% to 0% on the portion of registry orders that gifters complete on your store.
• Amazon Baby Registry, product-feed driven (Amazon SP-API), not full API. You push your catalog into Amazon, customers add SKUs to their Amazon registry, gifters buy on Amazon. You can deep-link from PDP to “Add to Amazon Registry” via Amazon’s ASIN-aware URL pattern. Tracks attribution back via UTM.
• Target Registry, thinner. Target’s Affiliate-style integration plus deep-link. Best for brands that also retail at Target physical, the registry is the digital tie-back.

Architecturally: Magento stores the registry reference as a customer attribute (one per registry partner). PDP renders the right “Add to…” button per visitor based on origin / preference. Order webhook fires back to the registry partner to mark items as fulfilled. Babylist is roughly 80% of premium-DTC baby-brand acquisition, if you’re not native, you’re paying their 20% commission instead of running native checkout.