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Independent MeasurementEndpoint record (L0 · L1)Published state: passLast probed: 2026-09-29 · today

x402-seller.onrender.com/gas/price

1.Catalog declaration

Catalog declaration for this endpoint
Resource URLhttps://x402-seller.onrender.com/gas/price
Sourcecdp_bazaar
Declared methodGET
Networkeip155:8453
Receiving address0xbd61dfb01f81c91f02b0ccd51b0220e0c8918639
Declared price (base units)1000
Catalog statusactive
First seen / last seen2026-08-14 08:39 UTC / 2026-09-29 01:02 UTC
Catalog-reported calls / payers (30d)6 / 6

2.Probe history

2026-08-142026-09-29
Figure 1. Probe timeline, last 21 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
2026-09-29 13:40 UTCGETpass402358 ms—
2026-09-28 16:40 UTCGETpass40275 ms—
2026-09-27 22:40 UTCGETpass40239 ms—
2026-09-27 04:40 UTCGETpass402182 ms—
2026-09-26 16:40 UTCGETpass40276 ms—
2026-09-25 22:40 UTCGETpass40297 ms—
2026-09-25 04:40 UTCGETpass402240 ms—
2026-09-24 13:40 UTCGETpass402354 ms—
2026-09-23 16:40 UTCGETpass402307 ms—
2026-09-22 22:40 UTCGETpass402307 ms—
2026-09-22 04:40 UTCGETpass402275 ms—
2026-09-21 13:40 UTCGETpass40224 ms—
2026-09-20 16:40 UTCGETpass40278 ms—
2026-09-19 22:40 UTCGETpass40240 ms—
2026-09-19 13:40 UTCGETpass402268 ms—
2026-09-17 16:19 UTCGETpass402104 ms—
2026-09-14 11:24 UTCGETpass402152 ms—
2026-09-11 11:24 UTCGETpass40245 ms—
2026-09-07 11:24 UTCGETpass40226 ms—
2026-09-02 11:24 UTCGETpass40219 ms—
2026-08-14 08:53 UTCGETfail40215 msaccepts_invalid402 without a payable accept in the header or the body (which part was missing was not recorded before the 2026-09-29 change).

3.L1 — real purchases

2 of 2 paid attempts settled on-chain, and 2 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 match
the response had the 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).
2/2
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
09-25 18:01settled (nonce-bound)2000x8717534f…70e311049 ms
1000 units (≈ $0.001 USDC) · L2 matchWhose side: no failure (delivered)
09-19 12:07settled (nonce-bound)2000xe9ce5e4f…cd151474 ms
1000 units (≈ $0.001 USDC) · L2 matchWhose side: no failure (delivered)

Embed this record

Run this endpoint? Show the settle-through record vet402 measured — the badge reads 2/2 settled · 2 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: 2 of 2 paid attempts settled with an on-chain receipt, and 2 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-seller.onrender.com · measured 2026-09-25)

[![vet402 receipt](https://vet402.com/api/badge/endpoint/f37e9bbf-28ae-41db-b0ee-d4814a2448bb.svg)](https://vet402.com/observatory/e/f37e9bbf-28ae-41db-b0ee-d4814a2448bb)

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.

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x402-seller.onrender.com/gas/price — x402 purchase and probe record | vet402