A powerful new upgrade that helps sellers validate their publisher partner’s data records quickly.
IAB Tech Lab’s Supply Chain APIs have helped the digital advertising industry find and demonetize misrepresented and fraudulent inventory. The APIs provide a portfolio of data sets including ads.txt (authorized digital sellers) data for over 8M publishers, app-ads.txt for over 480,000 apps, sellers.json for over 13,000 sellers and validation data sets that compare the two in bulk.
With invaluable feedback from our subscribers, we’ve learned that many sellers build their own data sets to validate the inventory partners they work with. Our newest feature enhancement to the Supply Chain APIs makes that super simple.
Supply Chain Validation for Sellers
This new feature focuses on the advertising system. Sellers will now be able to see every instance where their domain is listed in Ads.txt and App-ads.txt files across the ecosystem.

By viewing the validation data in this manner, sellers gain the ability to:
- Reveal Unauthorized Publisher Listings
Quickly identify publishers who have listed their advertising system without an active relationship. - Audit Their Sellers.json Coverage
Ensure their Sellers.json file accurately reflects their active supply chain partnerships. - Troubleshoot Multi-Domain Issues
Identify when their supply chain partners are referencing legacy advertising system domains for their company.
Available Now–Exclusively for Supply Chain API+ Subscribers
IAB Tech Lab is committed to continuing to add value to our members with new features and product enhancements. Supply Chain Validation for Sellers is available now to all Supply Chain API+ subscribers at no additional cost. Other benefits of Supply Chain API+ include; 5 days per week of fresh crawl data and a file completeness hash value in the API response.
Existing subscribers on the Supply Chain API basic plan with 3 days per week of crawl data are able to upgrade to API+ for an additional $2,500 per year above the price they currently pay.
If you are not yet a subscriber and would like to learn more about the service, please visit our Supply Chain API webpage.

Todd Henry
Sr Product Manager
IAB Tech Lab