How x402 discovery works
A paying client has to find endpoints before it can pay them. Two registries publish lists: the Coinbase CDP discovery catalogue, called the Bazaar, and the Binance B402 bazaar. TOLL reads both, every six hours, and builds the index from them.
What the registries publish
A registry record names the resource URL, the HTTP method, the accepts as declared by the seller, and a free-text description. The Coinbase catalogue also carries three quality counters on every record, calls and unique payers over the trailing 30 days and a last-call timestamp, and a curated flag on 80 of them. Binance’s registry carries no counters. Neither publishes a listing date, a title, a category or a human-readable price.
| listed in | endpoints |
|---|---|
| Coinbase only | 15,187 |
| both registries | 852 |
| Binance only | 128 |
| listed now, in all | 16,167 |
What TOLL takes from them
Every record, untouched, stored beside a normalised row; the same endpoint in both registries becomes one row keyed on its canonical URL, and that overlap of 852 is itself published. The counters are appended to a snapshot table every pull and never overwritten. An endpoint absent from a pull is recorded as absent at that pull’s time and confirmed delisted after 2 consecutive absences; its page never goes away (method).
What TOLL adds
- A daily sweep of every listing through Coinbase’s validate endpoint with the declared method, stored as a state and named checks, never a score.
- Derived fields the registries lack, each marked derived: a title, a category by published rules, a first-observed date, a price converted with verified decimals.
- The Ledger: every counter on every endpoint at every snapshot, and the findings that only a series can support, such as the share of calls held by the top 1% of endpoints.
- A pinned form of every page at a snapshot stamp, so a quoted figure stays checkable.
- A right of reply on every page, free, published unedited with its outcome.
What TOLL does not do: list on request, rank by the curated flag, measure on-chain settlement, or claim a service is live because a registry lists it. The comparisons with sites that do other things are at TOLL and x402-list, TOLL and x402scan and TOLL and agentic.market.