Overview

In early 2024 Amazon upgraded the Merchant Fulfillment v0 API by inserting a new Benefits object, enabling sellers to pull a detailed list of Amazon‑provided services attached to each shipping option. The enhancement surfaces both the services that are included and, when a service is missing, the exact reason codes explaining the omission. Sellers who rely on accurate fulfillment cost modeling and Prime eligibility checks should integrate this data to avoid surprise fees and to present the most trustworthy shipping choices to buyers.

Key Points

• Benefits object now part of API response — Every call to GetShippingServices can return a structured JSON block that enumerates Amazon‑sponsored perks such as claims protection, free returns, and Prime eligibility for each carrier’s offer.
• Exclusions come with reason codes — When a benefit is not supplied, the response attaches one or more predefined codes like INELIGIBLE_FOR_PRIME, REGION_NOT_SUPPORTED, or SELLER_NOT_ENROLLED that clarify why the service cannot be applied.
• Uniform schema across carriers — Whether the shipping method originates from UPS, FedEx, DHL, or Amazon’s own logistics network, the Benefits object follows the same field names (IncludedBenefits, ExcludedBenefits) and data types, eliminating the need for carrier‑specific parsing logic.
• Rate calculations now reflect benefit status — Included benefits can lower the displayed price to the customer (for example, free returns remove a $5 surcharge), while excluded benefits may require sellers to add manual adjustments or disclose additional fees in the checkout flow.
• Programmatic filtering becomes possible — By reading the Benefits object, developers can automatically hide offers that lack critical services, such as removing a ground‑shipping option that does not provide ClaimsProtection for high‑value orders.
• Documentation links reason codes to explanations — Each code maps to a section in Amazon’s developer guide, allowing software to translate cryptic identifiers into user‑friendly messages without hard‑coding custom text.