Required permission: read_returns and write_returns

Get shipping rates for return shipments from various carriers. This endpoint allows you to compare return shipping rates across different carriers and services before creating a return label.

The endpoint returns rates from supported return carrier integrations, including EasyPost, EasyPost User, Shippo, Buku, USPS, Spring GDS, FedEx, and DHL eCommerce. It shops carrier connections that are active, enabled for returns, and owned by either the organization or the requested client.

Note: For client-level API keys, the client_id field is automatically set to the client's ID and cannot be overridden.