Generate a commercial invoice document for an international shipment, detailing the goods, their value, and customs information required for cross-border clearance.

When to use: Call this endpoint when shipping internationally and the carrier or destination country requires a commercial invoice. This is typically needed alongside or after label generation.

Prerequisites:

• Valid JWT authentication token (Bearer)
• Complete origin and destination addresses (including country)
• Shipment details with carrier and tracking number
• Package contents: item descriptions, quantities, unit values, weight, and HS codes

Key behaviors:

• Returns a downloadable commercial invoice PDF URL
• USD is the recommended currency to avoid issues during customs inspections
• Each item should include an HS code for proper tariff classification (use /utils/classify-hscode if needed)
• The invoice is attached to the shipment and can be uploaded to the carrier via /ship/uploadDocuments