Wedding registry integration, how do Zola, The Knot, Honeyfund, Amazon Wedding sync with Magento?

Three integration patterns depending on the partner’s API maturity:

• Zola, cleanest API of the three. Magento product feed pushed via their Partner API; couples add your products to their Zola registry; gift purchases fire a webhook back to Magento creating an order with a registry-tag attribute + ship-to-couple-address. Couple gets a thank-you note; you get the order. Integration takes ~3 weeks.
• The Knot, feed-based + partner-managed. Push your catalog to their merchant team; they ingest weekly; gift purchases route through their checkout and you get an order export nightly. Slower turnaround but bigger audience (40M+ users).
• Honeyfund, cash-fund-first registry. Product integration is lighter (mostly for experience gifts and honeymoon contributions). Magento webhook handles the funding transfer.
• Amazon Wedding Registry, you need to be an Amazon seller. Same product feed, but Amazon owns the customer relationship; you fulfill against their orders. Worth doing for accessory + favor brands.
• MyRegistry, universal-registry aggregator. They scrape any URL into a registry, so couples can add your products without you doing anything. Free traffic.

Registry-driven orders convert at 2.4x the rate of search traffic in the data I see, and AOV is ~25% higher. For accessory + decor + favor brands the registry integration pays back inside 90 days. The piece most teams miss: the thank-you note automation for the gift-giver, bake it into Klaviyo and it lifts repeat purchase rates 12-18%.