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critical FORBIDDEN_GMP_GATEWAY_API

Forbidden - Insufficient API Scope

What this means

OAuth client lacks scopes or partner permission for this endpoint. Confirm app permissions in Developer Portal.

Why this happens

Specific issue affecting how Walmart Seller Center processes your product data — see the linked official article for the exact mechanism and fix.

How to fix it

  1. Open the linked Walmart Seller Center help article for the specific resolution steps.
  2. Identify which products are affected via Seller Center → Catalog → Item Issues.
  3. Make the necessary corrections in your product data feed.
  4. Re-upload the corrected feed and verify the issue clears in the next processing cycle (typically 4–24 hours).

Common pitfalls