App-Ads.txt

App-ads.txt is a text file app developers upload to their developer website, which lists the ad sources authorized to sell that developer’s inventory. Just like on web, the IAB created a system which allows buyers to know who is authorized to buy and sell specific in-app ad inventory, and who isn’t. This is an important step towards eliminating certain types of fraud, and improving the transparency and efficiency of the overall ecosystem. Most savvy brand marketers and demand side platforms won’t buy inventory that doesn’t have ads.txt implemented. 

How app-ads.txt works for mobile apps

A DSP looking to bid on app inventory scans the app-ads.txt file on a developer’s website to verify which ad sources are authorized to sell that app’s inventory. The DSP will only accept bid requests from ad sources listed on the file and authorized by the app developer.

How app-ads.txt can benefit your mobile app

1. Capture brand budgets
   Major brands and agencies are more likely to purchase app inventory via DSPs that verify authorized ad sources. By implementing app-ads.txt, developers signal to DSPs that their inventory is safe. Developers who don’t implement app-ads.txt are likely to be removed from DSPs’ pool of targeted media.
2. Fight ad fraud
   Bad actors may forge apps that impersonate legitimate apps, and mislead DSPs to spend brand budgets on their forged inventory. Legitimate developers end up losing out on ad revenue that was originally intended for them. App-ads.txt blocks unauthorized developer impersonations and minimizes instances of fraud that ultimately hurt developers’ bottom line.

App-ads.txt implementation

Here’s how you can make sure your inventory is covered by app-ads.txt:

Step 1.  Provide the developer website URL in your app listing

Ensure that your developer website is updated in the app stores. This website will be used by advertising platforms to verify the app-ads.txt file.

Step 2. Reach out to all ad sources (direct, resellers)

Get in touch with your direct ad sources and ask for their app-ads.txt line, according to the following IAB structure:

‘Ad source domain, your publisher ID, type of relationship (direct or reseller), ad source ID’

App-ads.txt example: ironsrc.com, 1234, DIRECT

Your direct demand partners should be listed as “direct.” If your partners are using third-party resellers to sell your inventory, such providers should be listed as “reseller.” In any case, you should not add any provider to your app-ads.txt file unless you or your partner have a direct relationship with them.

We’ve made it easier for you to include ironSource’s list of entries so that you will never miss any budgets from ironSource’s top brands partners. Copy and paste the following text block and include it in your txt file. Don’t forget to keep track of the list since it is updated from time to time.

ironSource authorized resellers

ironsrc.com, [yourironSourcePublisherAccountID], Direct
Remember to replace [yourironSourcePublisherAccountID] with your account ID, which you can get from your account manager.

adbility-media.com, 187, RESELLER
advertising.com, 8693, RESELLER
algorix.co, 54400, RESELLER, 5b394c12fea27a1d
aol.com, 25910, RESELLER
appads.in, 105536, RESELLER
appnexus.com, 2480, RESELLER, f5ab79cb980f11d1
appnexus.com, 7445, RESELLER
aralego.com, par-627DA26297666D280EA8323E33ABAED7, RESELLER
gamoshi.io ,267-b4808 ,RESELLER ,20e30b2ae1f670f2
improvedigital.com, 1114, RESELLER
inmobi.com, 3af76ebd8ed44d04b01d827c6f3bb5b4, RESELLER, 83e75a7ae333ca9d
openx.com, 537153564, RESELLER, 6a698e2ec38604c6
openx.com, 539363588, RESELLER, 6a698e2ec38604c6
openx.com, 540421297, RESELLER, 6a698e2ec38604c6
openx.com, 540838151, RESELLER, 6a698e2ec38604c6
pokkt.com, 5536, RESELLER, c45702d9311e25fd
pubmatic.com, 156177, RESELLER, 5d62403b186f2ace
pubmatic.com, 156425, RESELLER, 5d62403b186f2ace
pubmatic.com, 159087, RESELLER,5d62403b186f2ace
pubmatic.com, 160318, RESELLER, 5d62403b186f2ace
pubmatic.com, 160456, RESELLER, 5d62403b186f2ace
pubnative.net, 1006856, RESELLER, d641df8625486a7b
pubnative.net, 1007007, RESELLER, d641df8625486a7b
rhythmone.com, 3169196794, RESELLER, a670c89d4a324e47
rubiconproject.com, 11726, RESELLER, 0bfd66d529a55807
rubiconproject.com, 15526, RESELLER, 0bfd66d529a55807
rubiconproject.com, 18364, RESELLER, 0bfd66d529a55807
rubiconproject.com, 20050, RESELLER, 0bfd66d529a55807
rubiconproject.com, 22412, RESELLER, 0bfd66d529a55807
smaato.com, 1100040398, RESELLER, 07bcf65f187117b4
smartadserver.com, 3020, RESELLER
smartadserver.com, 4016, RESELLER
smartadserver.com, 4237, RESELLER
smartclip.net, 411, RESELLER
smartclip.net, 8153, RESELLER
smartclip.net, 9394, RESELLER
spotxchange.com, 307720, RESELLER, 7842df1d2fe2db34
stroeer.com, 17355, RESELLER
stroeer.com, 17379, RESELLER
undertone.com, 4108, RESELLER
video.unrulymedia.com, 3169196794, RESELLER
xad.com, 241, RESELLER, 81cbf0a75a5e0e9a
yandex.com, 37982190, RESELLER
mars.media, 1010463, RESELLER
appnexus.com, 13074, RESELLER, f5ab79cb980f11d1
gitberry.com, IG3S1B, RESELLER
bidmachine.io, 161, RESELLER
bidmachine.io, 162, RESELLER
smartadserver.com, 4354, RESELLER
pubmatic.com, 162017, RESELLER, 5d62403b186f2ace
hyperad.tech, 35, RESELLER
rubiconproject.com, 17328, RESELLER, 0bfd66d529a55807
pubmatic.com, 160145, RESELLER, 5d62403b186f2ace
conversantmedia.com, 100234, RESELLER, 03113cd04947736d
rubiconproject.com, 23644, RESELLER, 0bfd66d529a55807
triplelift.com, 12652, RESELLER, 6c33edb13117fd86
yahoo.com, 59262, RESELLER
indexexchange.com, 197137, RESELLER, 50b1c356f2c5c8fc
google.com, pub-2843405949989126, RESELLER, f08c47fec0942fa0
rubiconproject.com,17608,RESELLER,0bfd66d529a55807
loopme.com, 10287, RESELLER
pubmatic.com, 158154, RESELLER, 5d62403b186f2ace
xandr.com, 13799, RESELLER
yeahmobi.com, 5135347, Reseller
media.net, 8CUO7P3WK, RESELLER
App-stock.com,256917,RESELLER
videoheroes.tv, 212550, RESELLER, 064bc410192443d8
yabbi.me, f12bd731-2eb9-487c-9260-0c350e2d312b, DIRECT
betweendigital.com, 43713, RESELLER
triplelift.com,13042,RESELLER, 6c33edb13117fd86
improvedigital.com, 2162, RESELLER
improvedigital.com, 2163, RESELLER
smartadserver.com, 4140, RESELLER
pubnative.net, 1007262, RESELLER, d641df8625486a7b
Contextweb.com,562852,RESELLER,89ff185a4c4e857c
improvedigital.com, 2178, RESELLER
improvedigital.com, 2177, RESELLER
pubmatic.com, 157559, RESELLER, 5d62403b186f2ace
rubiconproject.com, 24400, RESELLER, 0bfd66d529a55807
rhythmone.com, 2464975885, RESELLER, a670c89d4a324e47
triplelift.com, 12240,RESELLER, 6c33edb13117fd86
rubiconproject.com, 25064, RESELLER, 0bfd66d529a55807
adform.com, 2995, RESELLER, 9f5210a2f0999e32
thebrave.io, 1234648, RESELLER, c25b2154543746ac
rubiconproject.com, 24752, RESELLER, 0bfd66d529a55807
appnexus.com, 14423, RESELLER, f5ab79cb980f11d1
triplelift.com, 12158, RESELLER, 6c33edb13117fd86
triplelift.com,11656,RESELLER,6c33edb13117fd86
conversantmedia.com,100269,RESELLER,03113cd04947736d
iqzone.com,IQ163,RESELLER
inmobi.com,59c7922793a3477b9419f0854d1da7e9,RESELLER,83e75a7ae333ca9d
webeyemob.com, 70174, RESELLER
openx.com, 540679900, RESELLER, 6a698e2ec38604c6
rixengine.com, 604523, RESELLER
pubmatic.com, 163075, RESELLER, 5d62403b186f2ace
Xapads.com, 163819, RESELLER
Pubmatic.com, 162882, RESELLER, 5d62403b186f2ace
google.com, pub-3990748024667386, RESELLER, f08c47fec0942fa0

Step 3. Publish an app-ads.txt file

Create an app-ads.txt file in Notepad listing out all the lines you received, and save.

Step 4. Upload

Upload the file in the root of your domain website (example: www.example.com/app-ads.txt).