app-ads.txt

Declare CloudX as an authorized seller in your app-ads.txt file so buyers can verify your inventory.

app-ads.txt is the IAB Tech Lab’s Authorized Sellers for Apps specification. It lets buyers verify that whoever sells your app’s inventory is legitimate and authorized. Buyers crawl the file regularly and can reject bid requests from undeclared sellers, so missing entries cost revenue.

Host the file

• Set the developer website URL in your App Store and Google Play listings. Crawlers derive the app-ads.txt location from it.
• Host the file at the root of that domain: https://yourdomain.com/app-ads.txt. One file covers every app published under the domain.
• Serve it over HTTPS, in lowercase, reachable from all geolocations. Buyers cannot verify entries in a file they cannot crawl.

File format

Declare one line per authorized seller:

<advertising-system-domain>, <account-id>, <relationship>

DIRECT means you control the account on that system. RESELLER means you have authorized another entity to sell your inventory through it. The full format, including the optional certification authority ID, is defined in the IAB ads.txt specification.

Append new lines to your existing file. Do not remove or modify lines that are already there — entries for other networks are unaffected, and an identical duplicate line is harmless.

The CloudX entry

cloudx.io, <YOUR_CLOUDX_ACCOUNT_ID>, DIRECT

Replace <YOUR_CLOUDX_ACCOUNT_ID> with your CloudX publisher account ID. It is the same seller ID that represents your account across CloudX — if you are not sure what it is, ask your CloudX account manager.

Validation

CloudX checks your app-ads.txt file regularly and will flag missing entries to your team.

After you publish the updated file, buyers re-crawl app-ads.txt on their own schedules. Expect demand from newly authorized partners to ramp gradually rather than immediately.