The problem: duplicate groups

If you run an ad network, the same seller accounts often need to appear differently depending on whose site they run on. On your own domain they are DIRECT. On the publisher domains you resell into, those same accounts must be RESELLER — with a MANAGERDOMAIN= line pointing back to you.

ads.txt Guru reuse groups already let you apply one set of records across many domains, but the relationship was fixed per record. So networks ended up maintaining two near-identical groups — one DIRECT, one RESELLER — and keeping them in sync by hand. Every account change had to be made twice, and the two drifted apart over time.

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Why we built it

Agencies managing ads.txt for dozens of publishers have been telling us the same thing: setting up each new domain still required a few manual clicks in our UI. For an agency onboarding their tenth or fiftieth client, those clicks add up.

So we've added two new API endpoints that let you automate the bits that were previously UI-only.

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If you run an ad sales agency or network managing multiple publisher clients, you're spending hours every week handling ads.txt files—often manually.

And those hours add up fast.

This post breaks down the real cost of manual ads.txt management vs. using a professional tool. The numbers might surprise you.

The Hidden Cost of Manual Management

Let's assume you're managing ads.txt for just 6 publisher clients (a conservative estimate for most agencies...

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After four years of limited updates, we're excited to announce that ads.txt Guru has been acquired by Williams Initiatives Ltd, effective August 2025.

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We are pleased to announce a new feature allowing additional ads.txt records to be appended to the end of the ads.txt file generated by ads.txt Guru.

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