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# Sellers.json Validation
- URL: https://www.adlingo.org/glossary/sellers-json-validation/
- Published: 2025-01-15T09:39:00.000Z
- Updated: 2025-01-15T09:39:00.000Z
- Description: The process of cross-referencing seller IDs across different supply chain transparency files to confirm the legitimacy of inventory sources.
- Author: Travis Lusk
- Tags: Programmatic, #glossary, #Import 2026-10-27 17:05

The process of cross-checking seller declarations across transparency files to confirm inventory actually comes from where it claims to. You compare the seller ID in the bid request against the SSP's sellers.json, then check whether that seller appears as authorized in the publisher's ads.txt. When all three match, you have a verified chain. When they don't, you have a discrepancy worth investigating. Automated tools do this at scale. Doing it manually on a sample gives you a fast read on how clean your supply actually is.