Walmart Developer Portal

Marketplace seller and supplier developers can get access to API tools and documentation to integrate with the Walmart eCommerce platform.


Marketplace sellers can manage items, orders, prices, inventory and more with Marketplace APIs.

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Drop ship vendors can scale their business to present items to millions of customers. To set up your your business with Walmart, use the tools and APIs to provide access to manage the items.

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Warehouse Suppliers can set up their business with Walmart APIs to scale their business to make their items available to millions of customers.

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Content service providers help suppliers to set up their catalog with Walmart to create enriched content, provide API integration, and act as a bridge between suppliers and Walmart.

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Welcome to the Walmart Developer Portal! Marketplace sellers and suppliers can find all the tools they need to begin the API integration process and access the API documentation. The API documentation provides seller and supplier developers and partners with the tools to become Drop Ship Vendors (DSVs), Marketplace Sellers, or Content Service Providers along with the developer solutions to succeed with their customers. Get started now and begin the API integration process and access the API documentation. Also, learn about product XSDs and use the API Explorer page to test your APIs.

We provide a comprehensive suite of tools to support our Partners:
  • API Status checker – Verify status of all APIs.
  • Try it Out – Try out API calls in the browser and view responses.
  • API Sandbox – Test your APIs on the backend.
  • API Documentation – How-to guides, API Reference, and FAQ.
To stay up to date with the latest offerings of the Walmart API Developer Portal, be sure to check out our What’s New page!
Access our comprehensive documentation to learn about our RESTful APIs. The API reference provides details about the endpoints, request/response structures, and sample codes. You can also find information about throttling limits, error codes, and other useful information. In addition, you can download the latest version of the XSDs.

How to get started

How do I get started?
Register to get your API Key

To get your API key, you need to register as a Marketplace Seller, Supplier, Solution Provider or Content Service Provider:

1. Fill out the registration form.
Solution Provider: and work with your seller to get your delegated access keys.
Supplier or Drop Ship Vendor:
Marketplace Sellers: login to the seller center to get your Client ID and Client Secret.
Content Service Providers: send an email to:
2. You will receive your portal login credentials after registration.
3. Login to the Developer Portal to get your API keys.
How do I integrate my application with the platform?
Integrate Your Application with Item Management APIs

Use the API Explorer page to test the APIs. Integrate your application with the item management platform by calling the item management APIs.
For setting up an item, use the provided XSDs to build an XML payload to ingest item feeds.

How can I test out my APIs? Do you have a test environment?

Yes! Use Walmart API Sandbox

The Walmart API Sandbox provides an environment to test Walmart APIs to ensure a successful integration and production launch. The Sandbox is only for backend testing of APIs and there is not an option to view or test on This environment uses test-only elements and simulated responses (based on mock data) and calls to applications in realtime.

All URLs, Endpoints, Users, Items, Orders, and currency/funds within the Sandbox are for testing purposes only. This environment provides production simulation, debugging, reports and ability to monitor API behavior before moving to production.

See what's new

Hazmat Item Feedback Loop API

Use this API to see a list of items that are on hold for hazmat compliance review, including items with an In Review, Action Needed, and Prohibited status. Also use this API to review your Action Needed error descriptions and understand how to correct them for further assessment.Your items will not be eligible for WFS until the hazmat […]

Formation of Walmart Developer Council

Dev council is a group of key partners that meets once every quarter with Walmart Marketplace product, business and engineering teams. The goal of council is to improve experience of developers of interacting with Walmart’s developer ecosystem (APIs, integration tools) via 2-way engagement. On August 18th 2021, Walmart had it’s first ever Developer Council meet where it […]

Item SetUp By Match 4.0 improvements

We recommend that Marketplace sellers use the new MP_ITEM_MATCH version 4.0 that has removed ProductTaxCode, product subcategory attributes, and support for additional Identifiers. Tax codes are now auto-generated and assigned to items during the item setup process. Sellers can select one of the provided categories in the spec based on their product category. ISBN and […]

Sellers can see how items perform with Listing Quality APIs

Marketplace sellers can now gain valuable insights into the performance of their items, fetch actionable listing quality data at the item-level, locate the number of items with issues per category, and see their overall catalog’s listing quality score with the new Listing Quality APIs. Get seller’s listing quality score – View a seller’s Listing Quality score […]

New Marketplace Item spec v4.2

We recommend that Marketplace sellers use the new MP_ITEM_SPEC version 4.2 that has removed the removed ProductTaxCode attribute. Tax codes are now auto-generated and assigned to items during the item setup process. Sellers can override a product tax code that was auto-assigned when the item was initially set up. The MP_ITEM_MAINTENANCE spec version 4.1 has the ProductTaxCode attribute that you can use […]

Marketplace sellers can update inventory across multiple fulfillment centers

Marketplace sellers can now update their item inventories at multiple fulfillment centers, aka ship nodes with the new Inventory APIs. Sellers can access accurate Inventory counts that subtract all in-progress orders, so they can see only inventory that is available for sale. The new parameter availToSellQtyprovides inventory available for each fulfillment center. You can use […]