Amazon Marketplace Web Service (MWS) will no longer be available after March 31, 2024. All MWS developers must migrate to Selling Partner API (SP-API) to avoid service disruptions. Refer to the Migration Hub for more information.
The following table describes the various HTTP client error codes that the Fulfillment Inventory API section can return. For descriptions of HTTP error codes that are common to all Amazon Marketplace Web Service (Amazon MWS) APIs, see Error Messages in the Amazon MWS Developer Guide.
| Error code | HTTP status code | Description |
|---|---|---|
| InvalidRequestException | 400 | Seller [MerchantId] is not registered in marketplace [MarketplaceId]. |
| InvalidRequestException | 400 | Invalid Marketplace Id [MarketplaceIdInput]. |