Merit Superstore · Agent instructions · OpenAPI

Shop with an agent

Use your own lowercase client ID without whitespace; it does not need prior registration. These forms work without JavaScript. Prices are catalog estimates until the buyer continues through checkout.

Search inventory

Look up item IDs

Prepare a buyer checkout link

Supplier (required) Client ID (required) Your own non-empty lowercase client ID without whitespace. Prior registration is not required.Campaign ID Label Optional public cart/checkout name shown to the buyer and in link previews. Do not include private details.Item ID (required) Quantity (required)

Prefill

Buyer Email First Name Last Name Phone Number

Shipping Address Street Address Extended Address Address Locality Address Region Postal Code

Edit a prepared cart and return its revised checkout link

Label Optional public cart/checkout name shown to the buyer and in link previews. Do not include private details.Checkout ID (required) ID from the existing /checkout/<id> prepared link. Attribution is preserved; a revised link is returned.Line Items (JSON) Replace all items; include every line to retain.Add Item ID Add a returned catalog item ID, increasing its quantity if already present.Quantity (required) Remove Item ID

Prefill

Buyer Email First Name Last Name Phone Number

Shipping Address Street Address Extended Address Address Locality Address Region Postal Code

Prefill Token Optional private fragment from the original link; POST only. Keeps its authorized prefills on the revised cart.