Entities that are selling inventory from a publisher are expected to add the sellers.json file to their root domain and list all of the publishers they work with (e.g. http://projectagora.com/sellers.json). Along with setting up sellers.json, they would also upgrade their OpenRTB integrations to version 2.3 or higher to support the SupplyChain object.
The final buyer (DSP) can cross-check the information from SupplyChain with sellers.json file. It is expected that there is an entry in the sellers.json defining the relationship with the SSP or ad exchange or reseller and a publisher that should match the information listed in SupplyChain.
The following components should be found in the sellers.json file:
- contact_email
- contact_address
- version (currently: 1.0)
- sellers, incl. name, seller_id, seller_type, is_confidential, directness and domain
Check out IAB’s documentation and FAQ here for more detailed information on sellers.json.