How in-app supply is declared and checked

What is app-ads.txt? The file, the format and where it goes The file every monetized app needs: what it declares, the four fields, the variables and exactly where verifiers look for it. 7 min read app-ads.txt vs ads.txt: what differs and what does not Same syntax, different discovery. Where each file lives, what each covers, and when you need both. 4 min read sellers.json explained: fields, seller types and how to read one The network's side of the declaration: every field, the three seller types, confidential entries and how lines are matched. 6 min read DIRECT vs RESELLER in app-ads.txt Which one to write, how buyers check it against sellers.json, and the mismatches that cost publishers bids. 5 min read

OWNERDOMAIN and MANAGERDOMAIN in app-ads.txt The ads.txt 1.1 variables that say who owns an app and who monetizes it, and how they tie to sellers.json. 5 min read Common app-ads.txt errors and how to fix them File not found, wrong host, stale seller IDs, relationship mismatches: what each error means and the fix. 7 min read app-ads.txt for CTV apps How CTV stores link to app-ads.txt, and how INVENTORYPARTNERDOMAIN handles shared inventory. 4 min read

The SupplyChain object (schain) explained The per-request record of who sold an impression: nodes, complete, hp, and how it is validated. 6 min read How buyers verify mobile app supply From store listing to schain: the checks a DSP runs on an in-app request, and what each can and cannot prove. 6 min read How to read a supply path Walk a declared path hop by hop through app-ads.txt and sellers.json, and know which signals matter. 6 min read