Ads.txt

Ads.txt is a special file promoted by the Interactive Advertising Bureau (IAB, not to be confused with the Internet Architecture Board) to let a site announce its officially endorsed ad networks and the associated account IDs in order to prevent fraud. It is placed in the root directory of a site similarly to robots.txt. The filename in actual use is all-lowercase,, but the spec refers to the standard as the capitalized. There is also a related spec for an "Authorized Sellers for Apps" file,.

Specs

 * Ads.txt spec v1.0.1
 * Ads.txt spec v1.0.2
 * Authorized Sellers for Apps spec v1.0

Sample Files

 * New York Times ads.txt

Other links and references

 * Official site
 * Ads.txt guide (Google)