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Independent MeasurementEndpoint record (L0 · L1)Published state: passLast probed: 2026-09-28 · 1 day ago

x402.coinstats.app/news/sources

1.Catalog declaration

Catalog declaration for this endpoint
Resource URLhttps://x402.coinstats.app/news/sources
Sourcecdp_bazaar
Declared methodGET
Networkeip155:8453
Receiving address0xa2ad8183209e5d2f7f0d8f995f5601a0bb5100c7
Declared price (base units)1000
Catalog statusactive
First seen / last seen2026-08-14 08:52 UTC / 2026-09-29 01:03 UTC
Catalog-reported calls / payers (30d)4 / 3

2.Probe history

2026-09-082026-09-28
Figure 1. Probe timeline, last 30 probes for this endpoint (UTC). Filled = pass, crossed = fail, dashed = unverified. Same-day probes overlap. Marks closer than one mark width are stepped down one lane.
L0 probe history, newest first
Probed atMethodVerdictHTTPLatencyReason
2026-09-28 16:40 UTCGETpass402293 ms—
2026-09-27 22:40 UTCGETpass402427 ms—
2026-09-27 04:40 UTCGETpass402292 ms—
2026-09-26 13:40 UTCGETpass402340 ms—
2026-09-25 16:40 UTCGETpass402425 ms—
2026-09-24 22:40 UTCGETpass402365 ms—
2026-09-24 04:40 UTCGETpass402192 ms—
2026-09-23 16:40 UTCGETpass402821 ms—
2026-09-22 22:40 UTCGETpass402166 ms—
2026-09-22 04:40 UTCGETpass402237 ms—
2026-09-21 13:40 UTCGETpass402494 ms—
2026-09-20 16:40 UTCGETpass402336 ms—
2026-09-19 22:40 UTCGETpass40269 ms—
2026-09-19 04:40 UTCGETpass40241 ms—
2026-09-18 13:40 UTCGETpass402467 ms—
2026-09-17 22:40 UTCGETpass402391 ms—
2026-09-17 04:40 UTCGETpass40239 ms—
2026-09-16 13:40 UTCGETpass402209 ms—
2026-09-15 16:40 UTCGETpass402198 ms—
2026-09-14 22:40 UTCGETpass40272 ms—
2026-09-14 13:40 UTCGETpass402189 ms—
2026-09-13 16:40 UTCGETpass402174 ms—
2026-09-13 04:40 UTCGETpass402144 ms—
2026-09-12 13:40 UTCGETpass4021821 ms—
2026-09-11 22:40 UTCGETpass402243 ms—
2026-09-11 13:40 UTCGETpass402645 ms—
2026-09-10 17:40 UTCGETpass402138 ms—
2026-09-10 05:40 UTCGETpass402246 ms—
2026-09-09 17:40 UTCGETfail402275 msmetadata_mismatchpayTo or network differs from the catalog declaration (the values compared were not recorded before the 2026-09-29 change).
2026-09-08 23:40 UTCGETpass402239 ms—

3.L1 — real purchases

3 of 3 paid attempts settled on-chain, and 3 of those also returned a 2xx response (delivered). Each settled row carries its on-chain transaction hash, and that transaction is the evidence. On this page a receipt means the seller's own settlement receipt (PAYMENT-RESPONSE); a settled row can have none (see “tx from our index”). A settled row reads as nonce-bound when the on-chain re-read also matched the one-time signature nonce we generated for that purchase, and amount + payee when it matched amount, payee, asset and chain with no nonce on record — the binding shipped on 2026-09-04, so earlier rows carry the weaker evidence and keep their label rather than being demoted (methodology). settled is the transfer we confirmed on-chain; delivered is the response arriving. A settled row whose paid request answered 5xx counts as settled and not as delivered — definitions.

Terms in this table

settled (nonce-bound)
vet402 confirmed the USDC transfer on-chain, and the on-chain re-read also matched the one-time nonce vet402 signed for that purchase.
L2 mismatch
the response lacked fields the listing's output schema declares.
Whose side
the same words as the seller page: seller's side only after failures on two different days (UTC), marked “under re-check”; vet402's side; or not sorted (the rules).
3/3
Figure 2. Settle-through: one cell per paid attempt. Filled = settled on-chain, crossed = signed, and not settled on-chain.
L1 purchase history, newest first
Attempted atResultHTTPOn-chain txLatency
09-22 12:10settled (nonce-bound)2000x4b9a281e…d09f1553 ms
1000 units (≈ $0.001 USDC) · L2 mismatchWhose side: no failure (delivered)
09-12 00:00settled (nonce-bound)2000xa60948e3…f9701133 ms
1000 units (≈ $0.001 USDC) · L2 mismatchWhose side: no failure (delivered)
09-04 12:09settled (nonce-bound)2000x067bc83d…42e31707 ms
1000 units (≈ $0.001 USDC) · L2 mismatchWhose side: no failure (delivered)

Embed this record

Run this endpoint? Show the settle-through record vet402 measured — the badge reads 3/3 settled · 3 delivered and updates as the record grows. It carries the host it is about and the date it was last measured, so a saved copy cannot pass itself off as current. It states a measurement, not a rating.

vet402: 3 of 3 paid attempts settled with an on-chain receipt, and 3 of those also returned a 2xx response. settled is the confirmed transfer; delivered is the response arriving. A measurement of what happened when vet402 paid this endpoint, not a recommendation. (x402.coinstats.app · measured 2026-09-22)

[![vet402 receipt](https://vet402.com/api/badge/endpoint/740e6d11-379d-45b2-b849-70f52d80c7ed.svg)](https://vet402.com/observatory/e/740e6d11-379d-45b2-b849-70f52d80c7ed)

Get one email when this record's verdict changes. No digest, no marketing — one message per change, and only for this endpoint. We first send one confirmation email; nothing else goes out until you confirm.

4.Catalog listing events

No listing changes observed.

unverified is not a failure; a fail is published only after two consecutive failing probes. Definitions: methodology.

5.Dispute this record

Think a measurement above is wrong? Say which probe or purchase and what you observed instead. One person reads it and replies. The record is never deleted on dispute: if it was wrong, the correction is published with the same weight; if it was right, it stands. Operators who control the receiving address can also sign a dispute via POST /api/v1/observatory/disputes (API reference), which re-measures through the normal publication gate.

About the purchase at 2026-09-12T00:00:54Z (UTC). The form starts with that time; add what you saw instead.

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