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Every rail page on this site ends at settlement. This is the sentence either side of it: what the work was advertised at before anybody paid, and what happened to the money afterwards.
What it costs
Prices sellers publish in the x402 catalogue, from 0.100¢ to $1000.00. Publishing a price is not evidence anybody paid it — what was actually settled is on the market page.
150 of the largest listings asked directly, and their answer compared to the price they published. Aimed at the expensive end rather than sampled at random: a sample this size cannot be representative, so it is pointed where a discrepancy would matter.
Not one seller quoted a price different from the one it listed. That is worth stating plainly, because the catalogue is self-reported and there was no reason in advance to expect it. The failure mode here is not overcharging — it is the 36 listings that still advertise a price and no longer ask for one.
1,564 agent cards declare x402 support. Asked at the endpoint they declare, 192 of the 400 sampled quoted nothing — and that is not evidence they were lying. A card declares a service root, and a root is not a paid resource: prices live one path down, which is where the catalogue above finds them. What the sweep establishes is that a declared endpoint cannot be used to discover a price, which is a gap in the registration standard rather than in the sellers.
Where the money goes
The four outcomes are not exclusive — an address that spends some and holds the rest is in two of them — so only the residual is a partition. It is drawn in grey because it is a fact about how far this linkage reaches, not a fifth thing agents do.
Holding a balance can only find an address our per-address balance reader has visited, and it has visited 749 — 16307 of which earn on a rail. Read as a fact about agents, that number says they are all broke; read correctly, it says the reader has not been pointed at the earner list yet. Trading can only find an address on the four venues we read, and none of them carries a single attributable agent.
What was actually settled, rail by rail: prices and settlement. The ladder these rails sit on: one ladder, seven rungs.