An IAB Tech Lab standard that lets app publishers declare which ad networks are authorized to sell their inventory.

Where do I put the app-ads.txt file?

At the root of the developer website listed in your App Store / Google Play page, e.g. https://studio.com/app-ads.txt.

What is a Certification Authority ID?

An optional TAG-ID of the ad system, the 4th field of an app-ads.txt record.

kayac.com app-ads.txt check

kayac.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 18 ad networks expect (100% of 6,629 lines).

Checked 20 Oct 2026. 8,064 lines, 5,070 unique records, 2,787 duplicates, 0 invalid lines, 35 ad networks detected.

Ad networks in kayac.com/app-ads.txt

Amazon Publisher Services — account 2c8ce7f0-04ac-4d2d-ba9b-5853ce4149f7: 1 line in the file
AppLovin — account 527c05dd9f411bf355558f9c2ef2a27b: 36 lines in the file
Bidmachine — account 460: 400 lines in the file
BIGO Ads — accounts 23174421, 1uz7s4b0lt: 400 lines in the file, 4 expected lines missing
Magnite (Rubicon) — accounts 12496, 26980: 2 lines in the file
Google AdMob — accounts pub-5256446794843681, pub-7112055678212370, pub-3803436775068007: 3 lines in the file
Chartboost — account 661380715cba1544db836cea: 400 lines in the file, 1 expected line missing
DT Exchange (Fyber) — account 210440: 400 lines in the file
InMobi — account f40e3c8cb058407e9e30cf3495044b36: 261 lines in the file, 11 expected lines missing
ironSource / LevelPlay — account 266937: 125 lines in the file, 1 expected line missing
Liftoff Monetize (Vungle) — account 5e4f394035080300173bd958: 391 lines in the file
Mintegral — account 19572: 400 lines in the file
Xandr (Microsoft) — account 11898: 1 line in the file
Display.io — account 2520: 21 lines in the file, 12 expected lines missing
PubMatic — account 166905: 1 line in the file
TikTok Ad Network (Pangle) — account 18437: 1 line in the file
Unity Ads — account 1664253: 161 lines in the file
Meta Audience Network — account 845606818841766: 1 line in the file
Yandex Ads — partner (reseller) lines only: 148 lines in the file, 20 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 92 lines in the file, 52 expected lines missing
Yango Ads — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing
Bidease — partner (reseller) lines only: 38 lines in the file, 11 expected lines missing
BlueSea — partner (reseller) lines only: 24 lines in the file, 13 expected lines missing
DSP Exchange — partner (reseller) lines only: 266 lines in the file, 295 expected lines missing
Madex — partner (reseller) lines only: 7 lines in the file, 11 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 283 lines in the file, 161 expected lines missing
Monetrix — partner (reseller) lines only: 64 lines in the file, 29 expected lines missing
Prado — partner (reseller) lines only: 20 lines in the file, 7 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing
Ogury — partner (reseller) lines only: 5 lines in the file, 12 expected lines missing
HyprMX — partner (reseller) lines only: 223 lines in the file, 146 expected lines missing
Start.io — partner (reseller) lines only: 125 lines in the file, 32 expected lines missing
Kidoz — partner (reseller) lines only: 16 lines in the file, 6 expected lines missing
CAS.ai — partner (reseller) lines only: 139 lines in the file, 26 expected lines missing
DSail — partner (reseller) lines only: 139 lines in the file, 26 expected lines missing

Corrected file: kayac.com app-ads.txt (fixed).

FAQ

Does kayac.com have an app-ads.txt?

Yes — https://kayac.com/app-ads.txt has 8,064 lines (checked 20 Oct 2026).

Which ad networks does kayac.com work with?

Its app-ads.txt lists Amazon Publisher Services, AppLovin, Bidmachine, BIGO Ads, Magnite (Rubicon), Google AdMob, Chartboost, DT Exchange (Fyber), InMobi, ironSource / LevelPlay, Liftoff Monetize (Vungle), Mintegral and 23 more.

Is the app-ads.txt of kayac.com correct?