## List Item An object containing params required for creating, updating or deleting list items or products. > 📘 Product metadata source of truth > > List item fields can include product identifiers and metadata used by Wishlist Plus APIs and the JavaScript SDK. Use returned product metadata only for the initial render. Before relying on product details for pricing, availability, display, cart, or checkout flows, fetch the current product and variant data from Shopify using the [Storefront API ProductVariant object](https://shopify.dev/docs/api/storefront/latest/objects/ProductVariant). ```javascript let product = { epi: epi, // one unique list item (empi+epi) per listid empi: empi, du: du, qty: qty, note: note, //optional cprops: {} // Optional custom attributes }; ``` ```curl Rest --data-urlencode 'epi: {{epi}}' \ # One unique list item (empi+epi) per listid --data-urlencode 'empi: {{empi}}' \ --data-urlencode 'du: {{du}}' \ --data-urlencode 'qty: {{qty}}' \ --data-urlencode 'note: {{note}}' \ --data-urlencode 'cprops: {{JSON stringified cprops}}' \ # Optional custom attributes ```

Argument	Type	Description
product.epi	number/string	Variant id of the product
product.empi	number/string	Product id of the product
product.du	string	Canonical uri of the product
product.qty\ (optional)	number	Defaults to 1. Quantity included for the action
product.note (optional)	string	Optional note
product.cprops\ (optional)	object	Optional. Map of custom fields
product.lbls\ (optional)	array	Optional. Array of strings indicating labels, rooms, etc. for HTC. Only one value supported in array. eg: 0-0": "li
product.\_av	bool	Optional. true if the list action was done without user explicitly picking a variant. Can be used by Wishlist UX to require user to pick variant before adding to cart