Notifications
Header Image
Guide
Troubleshoot common integration errors
Last updated on Sep 24, 2025
Reading time: 2 min
Overview

This guide summarizes common integration errors you may encounter when managing your Marketplace business through direct APIs or with approved Solution Providers. If the error continues to persist, select the Help button in the Seller Center menu bar to contact Seller Support.


Notes:

For common integration errors that occur in Seller Center, refer to our guide on troubleshooting item setup.

Common scenarios


1. You received an HTTP error.

Marketplace APIs rely on HTTP requests to send and receive data between systems. When an HTTP error occurs, it usually means something went wrong with the request or response, such as incorrect input, missing permissions or a server issue. These include errors like 400 Bad Request, 401 Unauthorized  and 404 Not Found, among others.


What should I do?


In Developer Portal, consult the error codes guide for detailed information and troubleshooting tips on HTTP request errors. You can also search for specific error codes in the API references.

2. Your approved Solution Provider lost connection.

Your approved Solution Provider’s connection to your account is valid for one year from the date you connect them on Seller Center. Walmart will notify you when a connection is close to expiring. Losing connection with your approved Solution Provider will stop your Marketplace data from syncing, which can result in errors such as missed shipments or auto-canceled orders.


What should I do?

If a connection does expire or is lost, you can reconnect the approved Solution Provider in your App Listings.


Regularly monitor the connection between your approved Solution Provider and your Seller Center account to ensure updates like orders and shipments are being updated correctly. If a connection issue occurs, contact your strategic account manager or create a case with Seller Support. Include the issue timeline, integration type, API used, error details and whether the issue is intermittent or continuous. 

Notes:

If you fulfilled a Marketplace order but it was not marked as shipped and the order was auto-canceled due to third-party desynchronization, Walmart is not responsible for any loss of product associated with the impacted orders, and you shall bear all costs for such a loss.

Tell us what you think

More in Item setup
Item setup methods: Overview
Item setup
This guide gives a high-level overview to start to build your product listings on Walmart Marketplace.
Add multiple items: Express setup
Item setup
This guide shows you how to add a new item to your catalog by searching products that are currently listed on Walmart.com. If you’re adding a new item to your catalog that’s not currently offered on Walmart, review Add a single item: Full setup.
Add multiple items: Match Walmart’s catalog
Item setup
In this guide, you’ll learn how to add multiple items to your catalog in Seller Center by matching them to products that are currently listed on Walmart.com.
About Walmart.com

Walmart Inc. (NYSE:WMT) helps people around the world save money and live better- anytime and anywhere - in retail stores, online, and through their mobile devices. Each week, approximately 240 million customers and members visit more than 10,500 stores and numerous eCommerce websites in 20 countries. With fiscal year 2023 revenue of $611 billion, Walmart employs approximately 2.1 million associates worldwide. Walmart continues to be a leader in sustainability, corporate philanthropy and employment opportunity.

c2025 Walmart. All Rights Reserved  | Privacy Policy