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What is Walmart Marketplace Developer Portal and who can use it?
Walmart Marketplace Developer Portal is the home for API documentation, API usage guidance, and API integration support for Marketplace APIs. Walmart Marketplace APIs support your eCommerce business by supplying essential data that enables you to make well-informed decisions. Approved Walmart Marketplace partners, sellers, and developers can use it to integrate items, inventory, orders, pricing, returns, reports, WFS, and more. For the complete list of API scopes and API integration options, refer to Integrate with Marketplace APIs.
How do I request access to Walmart Marketplace APIs as a seller?
Review information about what is required to become an approved seller in Before you start selling on Walmart Marketplace. You can choose to directly integrate with Marketplace APIs using clientID and clientSecret for authentication. You can also use Marketplace applications from an approved solution provider. For information, refer to Get started as a seller. If authentication fails (401), verify credentials, header format, and token/signature validity.
How do I get my API credentials (Client ID and Secret)?
  1. Navigate to the API Integration page in Seller Center.
  2. Select API Key Management to sign in to the Developer Portal with your Seller Center credentials.
  3. From there, locate your personal key pair (it has a lock icon next to it) and copy your Client ID and Client Secret.
How do I request access to Walmart Marketplace APIs as a solution provider?
Apply to become a Walmart Solution Provider by completing this submission form. Review information about how companies can be approved solution providers in Get started as solution provider. If authentication fails (401), verify credentials, header format, and token/signature validity.
What’s the difference between Sandbox and Production?
The Walmart sandbox is an environment for testing Walmart APIs before you launch your app. As a seller or solution provider, you can run simulations, debug, generate reports, and monitor API behavior before moving to production. 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 the ability to monitor API behavior before moving to production.
To get started with Walmart sandbox, refer to Walmart sandbox.
To simulate and validate integrations with WFS Multichannel (MCS) APIs, refer to WFS Multichannel Solutions (MCS) API Sandbox Guide.
How do I move my integration from Sandbox to Production?
  1. Pass your basic flows in sandbox (items → price/inventory → orders → returns).
  2. Swap base URLs and credentials to production.
  3. Launch a small canary set (5–10 items).
  4. Monitor errors, throttle, and SLAs; then scale.

Updated about 22 hours ago