The Walmart Open APIs provide developers with access to Walmart.com's product catalogue information and enable affiliates to earn money through customer referrals. The Data Feed and Special Feeds APIs allow developers to get lists or feeds of products by category. The taxonomy used to categorize items can be exposed via the Taxonomy API. Developers can use the Search API to perform a text search for items on Walmart.com or use the Product Lookup API to get a specific item's price and availability. The Walmart Open APIs are currently in Beta.
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The Walmart Ruby library is open to work with the Products Search API. Users who want to access this API, need to register for a Walmart Open account to obtain a key. API calls can be made from an interactive API tool. Documentation available at https://developer.walmartlabs.com/docs
The official Walmart Java library is open to interact with the Product Lookup API and the Search Lookup API.
Developers can download the source code, download the jar with dependencies, and access the java doc on GitHub. Sample code in Java language demonstrates how to work with special buy categories, fetch price information, and search results with keywords.