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.

expresso.pt app-ads.txt check

expresso.pt achieves the best ad optimization: its app-ads.txt has no errors and matches what its 6 ad networks expect (100% of 11 lines).

Checked 19 Oct 2026. 217 lines, 203 unique records, 2 duplicates, 0 invalid lines, 16 ad networks detected.

Ad networks in expresso.pt/app-ads.txt

Google AdMob — accounts pub-1678228639706296, pub-9486303979574677, pub-2083340746675773 and 4 more: 7 lines in the file
Magnite (Rubicon) — accounts 13510, 156042: 2 lines in the file
Smaato — account 1100058066: 1 line in the file
Xandr (Microsoft) — accounts 12069, 2928, 8233 and 1 more: 4 lines in the file
OpenX — account 559546789: 1 line in the file
PubMatic — accounts 81564, 156538: 2 lines in the file
Mintegral — partner (reseller) lines only: 34 lines in the file, 400 expected lines missing
Chartboost — partner (reseller) lines only: 41 lines in the file, 400 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 18 lines in the file, 400 expected lines missing
BIGO Ads — partner (reseller) lines only: 22 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 71 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 32 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 19 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 30 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 28 lines in the file, 341 expected lines missing
Bidmachine — partner (reseller) lines only: 37 lines in the file, 400 expected lines missing

Corrected file: expresso.pt app-ads.txt (fixed).

FAQ

Does expresso.pt have an app-ads.txt?

Yes — https://expresso.pt/app-ads.txt has 217 lines (checked 19 Oct 2026).

Which ad networks does expresso.pt work with?

Its app-ads.txt lists Google AdMob, Magnite (Rubicon), Smaato, Xandr (Microsoft), OpenX, PubMatic, Mintegral, Chartboost, DT Exchange (Fyber), BIGO Ads, Yango Ads, DSP Exchange and 4 more.

Is the app-ads.txt of expresso.pt correct?