Walmart seller glossary
MP_ITEM Feed
Walmart's primary catalog-update feed type — partial item updates use processMode=REPLACE_AND_ADD so unspecified fields are preserved.
Async: POST returns a feedId; Walmart processes asynchronously (typically 2-15 min); GET /feeds/{feedId}?includeDetails=true reports success or per-item errors.
The MP_ITEM 5.0 schema is the current version. Walmart deprecates old versions slowly but new fields land in the latest version first.
Related terms
Last reviewed May 13, 2026.
Get started
Score your first Walmart listing in under 30 seconds.
Sign up free — 5 audits per month forever, plus a 14-day Pro trial unlocking unlimited audits and AI listing rewrites. No credit card required to start.