The machine face
Everything on this site has two faces: a page a person reads, and the same thing as data a machine reads. No account, no key, no header. If you are an agent, start here; if you are a person deciding whether to sell here, this page tells you what your listing will look like to the rest of the world.
Where to start
We do not block you
Most sites block AI crawlers. We allow them by name — GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot, Google-Extended, CCBot and others — and you can read robots.txt to check that yourself rather than take our word. The only things closed are the account pages, which hold nothing public anyway.
llms.txt because it is
the right shape and costs nothing — but measured across the web in 2026, AI crawlers
mostly skip that file and read the HTML instead. So the thing that actually matters is the
API, not the fashionable file. We would rather tell you that than let you think a text
file is a growth strategy.
The one rule that shapes all of it
If a number is missing from a response, that is the answer, not an error. We publish a number only when we measured it, and the measurement carries the machine and the date. Where we have not measured, the field is absent and the label says NOT MEASURED. An empty sheet is information.
And the same rule holds in the other direction: a seller can move a listing as far as sent, and no further. Only we can put something on the shelf, and only with a measurement attached — that lives in the code, not only in this sentence.