listings
ad spots
exchanges and DSPs
countries
Outside the handful of platforms everyone already knows, buying advertising is opaque. A publisher's rate card sits behind a contact form, its ad sizes are on a media-kit PDF, and whether you can even reach it programmatically depends on which exchanges it authorises — a fact published in a file almost nobody reads. So most budgets go to the same five destinations by default, not by choice.
Every site that sells programmatically publishes a file naming the exchanges allowed to sell it, and whether each holds a direct account or resells. That file is the publisher's own claim, and it is where the supply paths here come from.
Exchanges publish the sellers they represent. Where both sides agree — the publisher names the exchange and the exchange names the publisher — the path is confirmed rather than merely asserted.
Placements, formats and the steps to buy are read off the page the seller wrote, and every listing keeps the URL it was read from so a claim can be checked.
Where a seller prints a number, it is recorded with the unit it was printed in. Where a seller does not, the listing says so instead of estimating.
101,667 publisher-to-exchange relationships across 1,292 exchanges, rebuilt from the source files rather than entered by hand.
Nothing here is invented to fill a column. A missing rate is shown as missing, an unranked site has no rank, and a relationship nobody published is not recorded. That makes the directory quieter than it could be, and it is the only reason the parts that are filled in are worth anything.
Start with the directory — every listing says what it sells and how to buy it.