Authorized Digital Sellers

/ads.txt (spec)

Defined by the IAB Tech Lab, ads.txt allows sites to specify which ad system accounts are authorized to sell their ad inventory.

Ad Sellers

/sellers.json (spec)

sellers.json is another standard by the IAB Tech Lab that is related to ads.txt and app-ads.txt.

It allows ad systems to provide details about the ad seller accounts listed in ads.txt and app-ads.txt resources.