Label Service

GS1 and SSCC-18 Labels via API

Generate compliant shipping labels on demand. Pass shipment data to our API and get back a print-ready label, correctly formatted to the trading partner's spec.

Get API Access

What is a Label Service?

Label Generation as a Service

Label Service is a REST API that generates GS1-128 carton labels and SSCC-18 pallet labels. You send shipment data (item, quantity, carton, and label ID) and the API returns a print-ready label in your preferred format.

No label software to install, no templates to build and maintain, no per-seat licensing. Just a simple API call that returns a compliant label every time.

Label Types

GS1-128 Carton Label

The standard shipping label used for carton-level identification in retail and distribution. Encodes SSCC, GTIN, quantity, lot, and other application identifiers in GS1-128 barcode format.

✓ Configurable application identifiers (AIs)
✓ Trading partner-specific layouts and field requirements
✓ ZPL, PDF, and PNG output formats
✓ 4x6 and 4x8 label sizes

SSCC-18 Pallet Label

Pallet-level labels using the 18-digit Serial Shipping Container Code. Required by most major retailers and DCs for inbound pallets. Supports mixed and homogeneous pallet configurations.

✓ Auto-generated SSCC numbers using your GS1 company prefix
✓ Retailer-specific pallet label formats
✓ Mixed pallet and single-SKU pallet support
✓ ZPL, PDF, and PNG output formats

How It Works

Configure Your Trading Partners

Set up label configurations for each trading partner once or use our label library to get started quickly. We store the spec: field layout, barcode symbology, required AIs, and print dimensions.

Call the API

At the time of shipment, POST your shipment data (items, quantities, carton or pallet ID, ship-to) along with the label ID to the Label Service API.

Receive a Print-Ready Label

The API returns the label in your requested format: ZPL for direct thermal printing, PDF for desktop or online printing, or PNG for display or archiving.

Print and Ship

Send the output directly to your label printer or integrate into your WMS, OMS, or warehouse workflow. No intermediate steps.

What You Get

✓ GS1-128 carton labels formatted to each retailer's spec automatically
✓ SSCC-18 pallet labels with auto-generated serial numbers from your GS1 company prefix
✓ ZPL output for Zebra and other direct thermal printers
✓ PDF and PNG output for web-based or cloud printing
✓ Bulk label generation for high-volume shipments
✓ Label audit trail tied to shipment and order records
✓ Spec updates managed by our team when retailers change requirements
✓ Create and maintain your own custom labels

Who It's For

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Developers building WMS, OMS, or fulfillment systems who need label generation without building and maintaining it themselves

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3PLs that fulfill for multiple brands and need to generate retailer-compliant labels across a wide range of trading partner specs

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Suppliers shipping to multiple retailers who each have different label formats, field requirements, or barcode configurations

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ERP and WMS vendors who want to add compliant label generation to their platform without building a label engine in-house

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Distributors that need pallet labels with SSCC numbers for inbound receipts at retailer DCs

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Integration partners who need a flexible labeling API to support retailer drop-ship and B2B compliance scenarios