List eligible shipping rates for the given address + subtotal.
Always returns at least one option (the merchant’s default zone is seeded by migration 018). Returns [] only if the merchant has actively deleted their default and configured no other zones — which the dashboard config UI in 4-C will prevent.
Documentation Index
Fetch the complete documentation index at: https://docs.stella-commerce.com/llms.txt
Use this file to discover all available pages before exploring further.