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vet402
Independent MeasurementEndpoint record (L0 · L1)Published state: passLast probed: 2026-09-04 · today
vet402Back to the registerMethodology

rubric-protocol.com/v1/x402/hedera-facts/exchange-rate

1.Catalog declaration

Catalog declaration for this endpoint
Resource URLhttps://rubric-protocol.com/v1/x402/hedera-facts/exchange-rate
Sourcecdp_bazaar
Declared methodGET
Networkeip155:8453
Receiving address0xab6731a0bcdf511c2842c768a03448075ab654ca
Declared price (base units)1000
Catalog statusactive
First seen / last seen2026-08-14 08:39 UTC / 2026-09-05 01:03 UTC
Catalog-reported calls / payers (30d)14 / 6

2.Probe history

2026-08-242026-09-04
Figure 1. Probe timeline, last 9 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
2026-09-04 23:40 UTCGETpass4021895 ms—
2026-09-04 14:40 UTCGETpass40224 ms—
2026-09-04 05:40 UTCGETpass40258 ms—
2026-09-03 17:40 UTCGETpass40231 ms—
2026-09-03 05:40 UTCGETpass40266 ms—
2026-09-02 17:40 UTCGETpass40226 ms—
2026-09-02 05:40 UTCGETpass402120 ms—
2026-09-01 23:40 UTCGETpass40222 ms—
2026-08-24 11:11 UTCGETpass40238 ms—

3.L1 — real purchases

2 of 2 paid attempts settled with a receipt, and 2 of those also returned a 2xx response (delivered). Each settled row carries its on-chain transaction hash — the receipt is the evidence. 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 4xx or 5xx counts as settled and not as delivered — definitions.

2/2
Figure 2. Settle-through: one cell per paid attempt. Filled = settled with an on-chain receipt, crossed = paid but no receipt.
L1 purchase history, newest first
Attempted atResultHTTPReceipt (tx)Latency
08-31 12:07settled (amount + payee)2000x84c2dc16…618e1096 ms
1000 units (≈ $0.001 USDC) · L2 no_declaration
08-24 23:35settled (amount + payee)2000x3678c13b…d0dd1183 ms
1000 units (≈ $0.001 USDC) · L2 no_declaration

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 states a measurement, not a rating.

vet402: 2 of 2 paid attempts settled, 2 delivered

[![vet402 receipt](https://vet402.com/api/badge/endpoint/19938289-456d-42aa-b041-eebbf690d684.svg)](https://vet402.com/observatory/e/19938289-456d-42aa-b041-eebbf690d684)

Get one email when this record's verdict changes. No digest, no marketing — one message per change, and only for this endpoint.

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.