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Errors

CART_EMPTY

CART_EMPTY

The request operates on an order whose cart contains no line items. Validation and placement both require at least one line item.

Reserved error code — not currently emitted by any endpoint. Partners may begin handling it defensively; backend will start emitting once wired in.

Summary

Field	Value
HTTP status	400
errorCategory	validation
retryable	false

When This Fires

• POST /v1/marketplace/orders/validate — the cart attached to the order has zero line items.
• POST /v1/marketplace/orders/place — placement attempted on an empty cart.

Recommended Action

Add at least one line item to the cart before resubmitting:

1. Re-open the menu (GET /v1/marketplace/stores/{storeId}/catalog) and let the user select an item.
2. Add it via your cart-mutation flow.
3. Resubmit validate / place.

A retry without modifying the cart will fail with the same error.

Example

Code
{
  "type": "https://developer.gett-tech.com/errors/CART_EMPTY",
  "title": "Bad Request",
  "status": 400,
  "detail": "The cart has no line items.",
  "instance": "/v1/marketplace/orders/validate",
  "requestId": "req_abc123",
  "timestamp": "2026-04-27T14:30:00.000Z",
  "errorCode": "CART_EMPTY",
  "errorCategory": "validation",
  "retryable": false
}