Customei for Shopify Plus
On Plus we swap fee variants for a Cart Transform Shopify Function. Personalization pricing is folded into the line item itself. No companion products in the cart, no reconciliation, and a checkout your finance team recognises.
Install in four steps
- 01
Install and enable the function
Same app, same block. On Plus, Customei deploys its Cart Transform function and switches pricing over automatically, the day you upgrade.
- 02
Map your catalogue
Bulk-attach option sets across collections rather than product by product, and drive them from your own systems over Customei's MCP server rather than the admin UI.
- 03
Wire up fulfilment routing
Route print files per vendor or per product type, so different categories reach different production partners without manual sorting.
- 04
Subscribe to order events
Point a signed webhook at your own systems and Customei posts each order event as it happens, with the personalization properties and production status on every line item.
What data moves
Nothing you have to re-enter.
- Cart Transform
- Personalization price is applied to the existing line item. No companion products.
- Agent & script access
- An MCP server over your account: list, create, update and clone option sets and templates, attach them to products, publish.
- Order webhooks
- Subscribe to order.created, order.paid, order.updated, order.fulfilled and order.cancelled. Signed, and retried before an endpoint is disabled.
- Multi-vendor routing
- Print files routed per vendor, product type or tag.
Themes
Theme and checkout
The same theme app block, plus compatibility with checkout extensibility. Because pricing happens in a Shopify Function rather than in the cart, personalization survives the custom checkout flows that would break a fee-variant approach.
Where it appears in the Shopify Plus admin
Schematics, not marketing screenshots. The point is the placement.
- Pricing engine
- Cart Transform Shopify Function
- Agent & script access
- MCP server · 50,000 calls / cycle
- Order webhooks
- Signed, retried, disabled after repeated failure
- Multi-vendor routing
- Per vendor, product type or tag
- Support
- Dedicated onboarding & priority support
Shopify Plus questions
We are mid-migration to Plus. Do we have to reconfigure?
Keep reading
Get started
Put it on a
real listing.
Every plan ships with a 14-day trial. No card, cancel anytime. Start with one product and judge it on that.