Unity Ads

Add one line for each account Unity Ads gives you: "unity3d.com, YOUR_ACCOUNT_ID, DIRECT, 96cabb5fbdde37a7". Use DIRECT when you hold the account yourself and RESELLER when a partner holds it and sells your inventory through unity3d.com. The account ID must be the seller_id Unity Ads lists for you in its sellers.json; Unity Ads will give it to you. Put the file at the root of the domain named as your developer website in the App Store and Google Play listings.

Yes. Its file at https://unity.com/sellers.json listed 19,205 sellers when we last read it on 9 October 2026: 19,205 publishers, 0 intermediaries and 0 listed as both; 0% are confidential.

11,165 apps in Stoqlab's data (delisted apps included) declare unity3d.com: 6,887 with at least one DIRECT line and 6,505 with at least one RESELLER line, across 931 app-ads.txt files. Counts are recomputed daily.

91% of the app-ads.txt lines naming unity3d.com carry "96cabb5fbdde37a7" in the fourth field. The field is optional; the IAB Tech Lab ads.txt 1.1 specification says identifiers in sellers.json supersede it, so a missing or different value does not make a line invalid.

Of 1,298 lines naming unity3d.com, 966 contradict its sellers.json. The most common case is "RESELLER but publisher" (768 lines): If the account is yours, declare it DIRECT. If a partner holds it, ask Unity Ads why the account is listed as PUBLISHER.

DIRECT means the publisher owns the account; RESELLER means an intermediary sells the inventory on the publisher's behalf. DIRECT lines should match a PUBLISHER entry in the network's sellers.json, RESELLER lines an INTERMEDIARY entry.