Seller Transparency Hub

Research methodology

Methodology

How fee data is sourced, verified, and categorized across major e-commerce marketplaces.

Data was collected from:

  • Public marketplace fee schedules
  • Platform policy announcements
  • Historical fee records
  • Seller Transparency Hub database

Scope

The report focuses on publicly available fee and policy information across major e-commerce marketplaces, including Amazon, Walmart Marketplace, and eBay. All data is sourced from official marketplace documentation and public policy announcements.

Sources

  • Amazon Seller Central
  • Walmart Marketplace
  • eBay Seller Center
  • Seller Transparency Hub Database

Methodology last reviewed June 2026. Corrections welcome — every record links back to its original public source.