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Documentation Index

Fetch the complete documentation index at: https://docs.kontext.so/llms.txt

Use this file to discover all available pages before exploring further.

ads.txt (web) and app-ads.txt (mobile apps) are plain-text files published at the root of a publisher’s domain. They list the companies authorized to sell that publisher’s ad inventory. Most DSPs check this file before bidding — if a seller isn’t listed there, they assume the inventory is fraudulent and skip it. For Kontext to bring you demand, your publisher’s ads.txt / app-ads.txt needs to list our authorization line. Adding it is a one-time setup and a hard requirement for ramping up fill rate.

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Where the file lives

  • Web app → https://yourdomain.com/ads.txt
  • Mobile app → app-ads.txt hosted at the root of your developer marketing site. The site that’s linked from your App Store / Google Play listing as the developer URL — that’s the domain DSPs will check, so the file must live there at https://yourmarketingsite.com/app-ads.txt.
If you already host one of these files for other ad partners, just append our line — don’t replace the file.

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The line you’ll add

We’ll send you the exact line to add during onboarding. It follows the standard IAB format: 
<seller-domain>, <publisher-id>, DIRECT, <certification-authority-id>
Once you’ve added it, no further action is needed on your side — DSPs will pick up the change the next time they crawl your file (typically within 24 hours).

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Updating later

If we add new sell-side partners or change our seller-domain, we’ll send you an updated line. Append the new line (don’t remove the old one until we tell you to) and the change will propagate the same way. If you’re not sure what your file currently contains or whether our line is in there, send us your ads.txt URL at support@kontext.so and we’ll verify.