Built on Stripe + the latest Shopify.
MerchantLayer apps run inside Shopify's newest infrastructure (Cart Transform, Validation, Theme App Extensions) and use Stripe as the PCI boundary for all money movement. No middleware. No checkout replacement.
Every MerchantLayer app embeds in Shopify Admin using App Bridge and Polaris. No external dashboard to learn — manage everything from inside Shopify.
Server-side fee injection that runs inside Shopify's checkout infrastructure as a WebAssembly function. The first enforcement layer for FeeLayer surcharges.
The second enforcement layer. Rejects orders where totals have been tampered with after Cart Transform. Combined, these two Functions make FeeLayer bypass-proof on Shop Pay, Apple Pay, and Google Pay.
Storefront fee disclosure component that adds itself to your theme without touching theme code. Upgrade-safe — no Asset API, no liquid edits.
Same fee rules at the register as online. Fee Engine settings flow from FeeLayer admin into the POS via metafields.
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