How much of the open web can an AI agent buy?
A publisher that wants AI buying agents to reach it publishes a small file naming the seller agents it trusts. We look for that file on every publisher we track, every week, and count.
The count appears here once live figures are connected.
First reading —. Latest reading —. Baseline
We will draw the trend once there are four weekly readings. Until then this is a starting point, not a movement.
The seller agents publishers name
Ranked by the number of publishers whose file authorizes them.
| Seller agent | Publishers |
|---|---|
| The ranking appears here once live figures are connected. | |
Who has declared
Publishers in our index with a valid file.
| Publisher | Agents named |
|---|---|
| Publishers appear here once live figures are connected. | |
How directly each exchange sells
From every publisher’s ads.txt: on how many sites an exchange is authorized as a direct seller, and on how many as a reseller. A higher direct share means fewer intermediaries between the buyer and the publisher.
| Exchange | Direct on | Resold on | Direct share |
|---|---|---|---|
| The table appears here once live figures are connected. | |||
What this count is, and is not
We report what the file says. A declared agent is not proof that the agent answers, or that anything has been sold through it.
The file we look for is /.well-known/adagents.json, defined by the Ad Context Protocol. Publishers that use another standard, or that list their agents in a registry only, are not counted here.
Our index covers the publishers named in the seller lists of the exchanges we read. It is a sample of the ad-funded web, not all of it.
Is a line about you wrong?
If your file changed, we pick it up on the next weekly pass. If we misread it, tell us and we check by hand.