This website provides a valid sellers.json file.
https://iabtechlab.com/sellers-json/
Advertising · ads txt · Seller JSON
Get access to data on 2,350 websites that are Sellers Json Provider Publisher Customers. We know of 1,703 live websites using Sellers Json Provider Publisher and an additional 647 sites that used Sellers Json Provider Publisher historically and 859 websites in the United States.
Get a list of 2,350 websites using Sellers Json Provider Publisher which includes location information, hosting data, contact details, 1,703 currently live websites and an additional 9,558 domains that redirect to sites in this list. 647 sites that used this technology previouslyand 859 websites in the United States currently using Sellers Json Provider Publisher.
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