List Shipping Methods

Returns the available shipping rates for the draft cart. The grouped result is flattened into one row per rate so the client can render a flat selector.

Endpoint

Endpoint	Method
/api/admin/carts/{cartId}/shipping-methods	GET

Sequence

The provider enforces the Create-Order sequence — both billing AND shipping addresses must already be saved on the cart, otherwise the response is HTTP 409 with Addresses must be saved before selecting a shipping method.