Walmart seller glossary
Walmart Marketplace API
The catalog + orders + inventory API for sellers on the Walmart Marketplace.
Requires Walmart Partner Network approval — typically 2-4 weeks. Once approved you receive a Client ID + Client Secret pair used for HMAC-style authentication.
Common endpoints: /items (catalog read), /reports (sales + inventory), /orders (read + acknowledge + ship), /returns (manage returns).
ShelfSEO uses Marketplace API for catalog sync — so when you click 'Apply rewrite to listing', we push the new title/description directly via the API.
Related terms
Last reviewed May 13, 2026.
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