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.

bostonherald.com app-ads.txt check

bostonherald.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 11 ad networks expect (100% of 56 lines).

Checked 20 Oct 2026. 1,170 lines, 915 unique records, 125 duplicates, 0 invalid lines, 23 ad networks detected.

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

Google AdMob — accounts pub-5831866191128057, pub-6414779639955145, pub-1301581561755234 and 5 more: 8 lines in the file
Amazon Publisher Services — accounts 3391, 5135, 661990cc-08cb-45bb-9ee2-90c2a9034640: 3 lines in the file
Index Exchange — accounts 185707, 185865, 193579 and 2 more: 5 lines in the file
Magnite (Rubicon) — accounts 17708, 15594, 24586 and 7 more: 10 lines in the file
PubMatic — accounts 162269, 158206, 158207 and 13 more: 16 lines in the file
Criteo — accounts 7597, B-060645: 2 lines in the file
TripleLift — accounts 2893, 2893-EB, 2825 and 1 more: 4 lines in the file
Sovrn — accounts 268322, 268322-eb, 224799 and 4 more: 7 lines in the file
Xandr (Microsoft) — accounts 7541, 7745: 2 lines in the file
Yahoo — accounts 58763, 56611, 100050: 3 lines in the file
Smaato — accounts 1100054548, 1100055215, 1100059219: 3 lines in the file
Mintegral — partner (reseller) lines only: 31 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 14 lines in the file, 376 expected lines missing
Chartboost — partner (reseller) lines only: 26 lines in the file, 400 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 10 lines in the file, 400 expected lines missing
BIGO Ads — partner (reseller) lines only: 45 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 79 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 39 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 38 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 34 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 14 lines in the file, 355 expected lines missing
Start.io — partner (reseller) lines only: 12 lines in the file, 145 expected lines missing
Bidmachine — partner (reseller) lines only: 79 lines in the file, 400 expected lines missing

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

FAQ

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

Yes — https://bostonherald.com/app-ads.txt has 1,170 lines (checked 20 Oct 2026).

Which ad networks does bostonherald.com work with?

Its app-ads.txt lists Google AdMob, Amazon Publisher Services, Index Exchange, Magnite (Rubicon), PubMatic, Criteo, TripleLift, Sovrn, Xandr (Microsoft), Yahoo, Smaato, Mintegral and 11 more.

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