From IAB TechLab Wiki
Resources for Publishers
The following are SSPs/exchanges help documents on how to implement ads.txt with exchange-specific information where needed:
- One by AOL: Mobile, Display, Video and Brightroll/Gemini from Yahoo!
- DoubleClick Ad Exchange (Google)
Resources for DSPs and SSPs/Exchanges
- Ads.txt Normalization Mappings: Tables for a list of known exchanges with canonical domains, as well as common mis-spellings observed in the wild.