Overview

Amazon has upgraded the Fulfillment Inbound API v0 to include a new ShipsInProductPackaging option, indicating that a unit arrives at an Amazon fulfillment center still sealed in its manufacturer’s box. The enhancement launched this week and matters to every FBA seller who submits inbound shipment plans, because it changes how packaging information is reported and can affect fee calculations.

Key Points

• New enum entry — ShipsInProductPackaging is now part of the PrepInstruction list, enabling sellers to set the flag directly through API calls.
• Response payload change — The prepInstructions endpoint now returns ShipsInProductPackaging alongside other prep steps such as polybagging or labeling.
• Universal eligibility — All FBA sellers, regardless of marketplace or account size, can use the flag; it is no longer limited to a manually enabled subset.
• Simplified compliance — Items that already arrive in sealed, retail‑ready packaging no longer need extra prep instructions, cutting down the number of steps sellers must declare.
• Potential fee waiver — When the flag is present, Amazon may drop certain prep‑related charges because the product is considered ready for sale on receipt.
• Immediate schema rollout — The updated enum is active now, but inbound plans created before the change will continue to use the older list until they are refreshed or rebuilt.

How the Updated Inbound API Works

1. Add the flag to the request — When constructing a CreateInboundShipmentPlan payload, sellers insert "ShipsInProductPackaging": true inside the PrepDetails object. Example: A supplier sending a pallet of 24‑pack bottled water marks the flag so Amazon knows each bottle is already sealed in its factory case.
2. Amazon validates the entry — The service checks the SKU against the catalog to confirm the product is listed as shipped in original packaging; a match results in acceptance, otherwise a validation error is returned. : A seller of custom‑printed tees receives an error because the catalog marks the shirts as “unpackaged,” prompting the seller to update the catalog or remove the flag.