Shopify's Admin GraphQL API version 2026-04 adds barcode support to inventory shipments. A new nullable `barcode` field and `inventoryShipmentSetBarcode` mutation allow merchants to assign scannable identifiers (e.g., GS1-128 codes) to shipments, enabling entire shipments to be received in a single scan rather than item by item. Barcodes must be unique per shop, are capped at 255 characters, and have whitespace automatically stripped. Specific error codes handle duplicate barcodes, missing shipments, and length violations.
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