Rate and create an international shipment using the DHL Express MyDHL REST API

Verified steps

1. Authenticate with DHL MyDHL API using HTTP Basic Authentication with your API key and secret (verify authentication scheme and base URL in current DHL MyDHL API docs, as credentials and endpoint may vary by region).
2. GET the rates endpoint (verify path in current docs) with query parameters for 'accountNumber', 'originCountryCode', 'originCityName', 'destinationCountryCode', 'destinationCityName', 'weight', 'length', 'width', 'height', 'plannedShippingDateAndTime', and 'isCustomsDeclarable' (boolean for international dutiable shipments); the response lists available DHL Express product codes and rates.
3. Select the product code (e.g., 'P' for DHL Express Worldwide; verify current product codes in DHL docs) that meets your cost and transit time requirements.
4. POST to the shipments endpoint (verify path in current docs) with a comprehensive request body including 'productCode', 'plannedShippingDateAndTime', 'pickup', 'accounts' (with your account number and 'typeCode'), 'customerDetails' (shipper and receiver with full address and contact), 'content' (with 'packages' including weight/dimensions and 'commodities' for customs), and 'outputImageProperties' (label format).
5. Parse the response for 'shipmentTrackingNumber', 'trackingUrl', 'packages' with per-piece waybill numbers, and 'documents' containing base64-encoded label and shipment documents.
6. Decode and print the label; attach all required customs documents to the physical shipment.