What’s new
Stay current on Walmart Marketplace API changes and explore what’s new.
Walmart has updated the Ship with Walmart API documentation to clarify the requirements and usage of the shipByDate and deliverByDate parameters.
Search the Walmart catalog by EAN or ISBN in the US market, and learn about the latest MP_ITEM_MATCH SFF 5.x support changes. Read the full launch post for details, migration guidance, and next steps.
A new LISTING_QUALITY and CONTENT_QUALITY reports have been added to help sellers and Solution Providers programmatically retrieve quality insights in bulk. query parameter is available in Returns performance metrics requests and responses.
A new conditionType query parameter is available in Returns performance metrics requests and responses.
The Simplified Shipping Settings endpoints will be deprecated on August 4, 2026. Sellers and solution providers currently using the old endpoints will need to migrate to the new SSS 2.0 endpoints launching on August 31, 2026, to prevent any disruption.
Virtual Packs are now available for eligible U.S. API sellers through existing Item Management endpoints.
isCustomerFavorite query parameter has been added to to the GET Unpublished Items API.
A new item specification version, 5.0.20260608-18_15_07-api, is now available for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM, and OMNI_WFS feed types.
The Item Performance report API now supports time-based aggregation with new dateGranularity request parameter.
The get RAP post-purchase items API now supports filtering by customer favorite status and returns customer favorite information for each item, helping you identify and prioritize products for Review Accelerator Program (RAP) enrollment.
WFS inventory and shipment-quantity recommendations includes a customerFavorite indicator for filtering and insights.
Walmart has added a new inDemandIndicator query parameter for Listing Quality in Insights management API.
Walmart has added new VEHICLE_DETAILS tags in a miscAttribute group type in the Orders Management API.
The Walmart Ship With Walmart API now supports a new Get ship-on-date endpoint.
New SEM item diagnostics and campaign recommendations APIs are now available. Retrieve item-level diagnostics, issue metadata, and campaign optimization recommendations to help identify blocked items, resolve issues, and improve SEM campaign performance.
We've introduced Marketplace sandbox recipes to help you validate common Marketplace workflows using step-by-step guidance.
We've expanded guidance for sellers and solution providers on creating and managing item variants.
The On-request Reports API reference now supports two Search Insights report types.
Item setup spec 5.0.20260501-19_21_29-api is now available for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM, and OMNI_WFS feed types.
Use the new Ship With Walmart scan form APIs to generate and download USPS shipping manifests for carrier pickup.
We updated the pricing insights API to include Walmart-recommended pricing information.
Insights API allows sellers to access late shipment summary metrics and download order-level late shipment reports.
The Assortment Recommendations API has new tag values to help sellers understand why an item is recommended.
Item spec version 5.0.20260330-14_47_14-api is now available for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM, and OMNI_WFS feed types.
Item Search API now supports ASIN search and responseFormat=SPEC for item setup workflows.
Use the new Simulations API to simulate returns, refunds, inventory and settings in the Walmart Marketplace dynamic sandbox.
Performance alarms are now triggered by seller activity instead of a fixed schedule.
New item spec version 5.0.20260304-22_45_32 available for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM, OMNI_WFS feed types.
The Assortment recommendations API has added new functionality to help you discover high-opportunity, customer favorite items, and receive recommendations directly into your systems.
We have published a new Multi-Line Multi-Quantity (MLMQ) Migration Guide for Walmart Marketplace APIs.
Automotive sellers can now access customer vehicle information directly at the item level in the API, making it easier to review compatibility details as soon as the order is placed.
New item spec version 5.0.20260205-21_38_48 is available for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM, OMNI_WFS feed types. Review attribute and enum updates that close spec gaps and improve item setup, validation, and variant consistency.
Refunds performance endpoints are being deprecated. Make sure to replace Refund endpoints with Return and Item Not Received endpoints.
This release adds an optional statusReason field for denied GTIN exemption requests to explain the denial directly in the API response.
We’ve introduced an improved Help and Support experience for Walmart Marketplace APIs. This update centralizes support resources, and makes it easier to find answers across different stages of integration.
Receive seller performance alerts and KPI reports in real time with the Performance webhook integration.
We have published a new API Deprecation Guide for Walmart Marketplace APIs.
We are excited to share that the Buy Box notification has expanded the payload to include offer-level data and improving notification timeliness
New item spec version 5.0.20260114-19_40_57 available for MP_ITEM, MP_MAINTENANCE, MP_WFS_ITEM, OMNI_WFS feed types.
Discover available 1099-K tax forms by payout year and download the PDF for compliance. Use Get tax forms to find the right formId, then Download tax form to retrieve and save the Base64-encoded PDF—ideal for automating year-end reporting and enabling self-serve downloads.
A new Integrating with Marketplace APIs course is available in Marketplace Learn.
Use the Simulations API to simulate items and orders in the Walmart Marketplace dynamic sandbox.
Use the ORDER_UPDATES webhook to receive near real-time order lifecycle updates at your endpoint. One consistent payload with extensible sub-events lets you trigger fulfillment, handle cancellations, and reduce polling.
Sellers can request Inventory Recommendations via API, which provides demand forecasts and OLQ signals without signing into Seller Center.
Seller performance APIs now provide returns and items not received summary and reports.
Seller performance APIs now provide negative feedback performance summary and reports.
A new Item spec version 5.0.20251118-18_39_44 is now available. To download a copy or review a comprehensive list of all the minor and major changes, refer to the Item spec reporting and version table.
Bulk Item Setup API now supports the DELETE_ITEM feed type. Use it to remove multiple seller-fulfilled (SFF) SKUs in one request for faster catalog cleanup and more consistent item lifecycle management.
Three new WFS Recommendations APIs are now available, offering actionable insights to help prioritize high-impact catalog actions.
We are excited to launch the Walmart+ bulk enrollment for seller-fulfilled (SFF) product listings via a new feed-based API workflow.
The new MCS API sandbox supports custom test data simulation, enabling users to create, modify, and manage their own mock data for testing end-to-end workflows.
Seller Performance API now uses clearer labels and adds fields to improve parsing and reporting.
We’re excited to announce the launch of Walmart Preferred Carrier APIs, designed to support automated fulfillment workflows for Walmart Fulfillment Services (WFS).
The GTIN Exemption Status API allows sellers to track the progress of exemption requests submitted through Seller Center. The API returns real-time status updates that match what appears on the Seller Center dashboard: Approved, Denied, Processing, or Requires More Information.
A new Item spec version 5.0.20250828-17_32_59 is now available. To download a copy or review a comprehensive list of all the minor and major changes, refer to the Item spec reporting and version table.
Submit and track protection claims for Ship with Walmart labels. Supports lost in transit, lost after delivery, and damaged shipments. See the
Shipment Protection API overview.
Sellers can request an API traffic report to view historical Marketplace API traffic and client-error data. The report includes a breakdown by API endpoint and 4xx error code. Use the date range filters dataStartTime and dataEndTime to set the lookback period; by default it pulls the past 30 days, with a maximum lookback of two years.
We’re pleased to announce the launch of new Pricing Insights API. Using this API you can get comprehensive pricing insights for your items on Walmart Marketplace.
A new Item spec version 5.0.20250612-15_17_48 is now available. To download a copy or review a comprehensive list of all the minor and major changes, refer to the Item spec reporting and version table.
TLS versions 1.0 and 1.1 are deprecated on Aug 5th, 2025 . Users need to update their implementations to TLS 1.2 or 1.3.
The On-Request Reports API now supports scheduled report generation.
Configure schedules for each report type and receive completed files
at your destination URL.
We’re excited to announce the launch of WFS Inventory Reconciliation API, to generate a summary of net inventory movement for a specified date range.
We’re excited to announce the launch of Recommended Shipment Quantity API, designed to support efficient inventory management.
We’re excited to announce the launch of Entity Match API, designed to streamline the way we share seller entity data with our Payout Service Providers (PSPs). This enhancement addresses a key challenge in our payment process and supports our ongoing commitment to efficient and secure financial operations..
A new version of Item spec, 5.0.20250605-14_26_25, is now available. To download a copy or review a comprehensive list of all the minor and major changes, refer to the Item spec reporting and version table..
We’re pleased to announce the launch of a new Walmart Multichannel Solutions (MCS) Sales Channel APIs, giving sellers and partners the tools to integrate and manage sales channels beyond Walmart.com.
The Marketplace Item team will be deprecating the Item spec sheet 4.x on August 31st, 2025. The new Omni 5.x spec offers improved data accuracy, easier item maintenance, and seamless integration with the new Product Type attributes.
We’re pleased to announce the launch of a new WFS Inventory API. The WFS Inventory API provides real-time inventory data for items fulfilled through Walmart Fulfillment Services (WFS).
We are excited to announce an enhancement to the Update Reduced Referral Fee Incentives Enrollment API. This update introduces a new optional request parameter: incentiveId.
Seller Performance Standards, previously only available on Seller Center, are now accessible through both the Seller Center and API endpoints.
To download a copy of the latest 5.0 item spec or review a comprehensive list of all the minor and major changes, refer to the Item spec reporting and version table.
Walmart Marketplace now includes a centralized API changelog. This feature is found by navigating to Changelog in the top navigation.
Sellers setting up a Restored item must now include two new required attributes when setting up the item.
Failure to provide these attributes when setting up a Restored item will result in an unsuccessful item setup.
The Top Trending Items API is no longer supported and will be sunset after March 31st, 2025.
To prevent disruption to your business, we recommend to refrain from submitting any further requests to the API and to disconnect the endpoint at your earliest convenience. If you require further assistance, contact our Support Team.
The On-Request Reports API now features an optional date range filter that can be used when requesting select reports using the POST Create Report Request endpoint.
We have updated the Item Listing Quality Details and Seller Listing Quality Score API endpoints to provide the same insights you can get from the Listing Quality page on Seller Center.
The Marketplace Price Incentives team is excited to announce the launch of a new API for the updated Price Incentives program.
We’re excited to announce the launch of the new API for the updated Pro Seller program.
We are thrilled to announce that we are launching a new lag time report for sellers to view configured lag times for their items.
On September 18, 2024, Preorder and its related information will be available across various APIs.
Starting May 8, to provide additional visibility to your major appliances item, the following attributes will become required while setting up items in major appliances product types through Seller Center.
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