Verified facts
What happened
Amazon’s official Selling Partner API Release Notes say the changes take effect on September 28, 2026.
The update covers attribute usage and enumeration values for numerous product types across Amazon stores.
The available evidence does not identify the affected product types, individual attributes, replacement values, or required seller actions.
Business relevance
Why it matters
If a seller’s listings or integrations depend on the affected attributes or allowed values, data submitted after September 28 may need to follow revised rules.
Because the notice is global in scope but does not list the affected catalog areas in the supplied evidence, sellers should verify applicability by marketplace, product type, and integration before changing production data.