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

api.xona-agent.com/base-main/audio/elevenlabs-music

1.Catalog declaration

Catalog declaration for this endpoint
Resource URLhttps://api.xona-agent.com/base-main/audio/elevenlabs-music
Sourcecdp_bazaar
Declared methodPOST
Networkeip155:8453
Receiving address0x515e7bce44baa5f6e42d16d4b5f27768e7f2f8cc
Declared price (base units)250000
Catalog statusactive
First seen / last seen2026-08-14 08:39 UTC / 2026-09-29 01:03 UTC
Catalog-reported calls / payers (30d)2 / 1

2.Probe history

2026-08-242026-09-28
Figure 1. Probe timeline, last 29 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 10:30 UTCPOSTpass402900 ms—
2026-09-23 16:40 UTCPOSTfail—10000 mstimeoutNo response headers arrived within 10 seconds.
2026-09-23 04:40 UTCPOSTpass4021086 ms—
2026-09-14 16:40 UTCPOSTpass402765 ms—
2026-09-14 04:40 UTCPOSTpass402942 ms—
2026-09-13 13:40 UTCPOSTpass402777 ms—
2026-09-12 22:40 UTCPOSTpass4021081 ms—
2026-09-12 04:40 UTCPOSTpass402800 ms—
2026-09-11 16:40 UTCPOSTpass402895 ms—
2026-09-11 04:40 UTCPOSTpass402823 ms—
2026-09-10 14:40 UTCPOSTpass402759 ms—
2026-09-09 23:40 UTCPOSTpass402857 ms—
2026-09-09 14:40 UTCPOSTpass4022362 ms—
2026-09-08 17:40 UTCPOSTpass402851 ms—
2026-09-08 05:40 UTCPOSTpass402806 ms—
2026-09-07 17:40 UTCPOSTpass402842 ms—
2026-09-07 05:40 UTCPOSTpass402747 ms—
2026-09-06 17:40 UTCPOSTpass402766 ms—
2026-09-06 05:40 UTCPOSTpass402899 ms—
2026-09-05 17:40 UTCPOSTpass402888 ms—
2026-09-05 05:40 UTCPOSTpass402780 ms—
2026-09-04 17:40 UTCPOSTpass402808 ms—
2026-09-04 05:40 UTCPOSTpass402283 ms—
2026-09-03 17:40 UTCPOSTpass402519 ms—
2026-09-03 05:40 UTCPOSTfail502324 msno_402HTTP 502 instead of 402 to an unpaid POST.
2026-09-02 17:40 UTCPOSTpass402284 ms—
2026-09-02 05:40 UTCPOSTpass402818 ms—
2026-09-01 23:40 UTCPOSTpass402271 ms—
2026-08-24 11:11 UTCPOSTpass402767 ms—

3.L1 — real purchases

1 of 1 paid attempts settled with a receipt, and 0 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 5xx counts as settled and not as delivered — definitions.

1 of those paid attempts are held as inconclusive rather than counted against this seller (1 settled and answered 4xx, 0 answered 4xx with no settlement receipt, 0 answered 402 or 5xx while our own payer wallet was out of USDC, 2026-09-13 00:00 to 2026-09-15 23:49 UTC). A 4xx says the request was not one the server would accept, and we cannot rule out that the request was ours to get wrong: vet402 buys with no API key of the seller's, and sends a POST body only when the seller declares one. This is the same principle the methodology already applied to path_template URLs, applied to the body and the authentication header as well. The rows are not deleted and not hidden — they are below, with their status and HTTP code, and they are out of the denominator for delivered (corrections).

Terms in this table

settled (amount + payee)
vet402 confirmed the USDC transfer on-chain; the on-chain re-read matched amount, payee, asset and chain; no nonce was on record (rows before 2026-09-04).
settled_4xx
held_reason in the export: the payment settled, then the paid request got a 4xx.
L2 not_checked
not checked: the paid request did not answer 200, so there was no response to check against the listing's output schema.
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).
1/1
Figure 2. Settle-through: one cell per paid attempt. Filled = settled with an on-chain receipt, crossed = signed, and not settled on-chain.
L1 purchase history, newest first
Attempted atResultHTTPReceipt (tx)Latency
08-24 23:37settled (amount + payee)4000x7925c8ad…36822274 ms
250000 units (≈ $0.25 USDC) · L2 not_checkedWhose side: not sorted: charged, then rejected an input vet402 had not sent

Embed this record

Run this endpoint? Show the settle-through record vet402 measured — the badge reads 1/1 settled · 0 delivered · 1 inconclusive 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: 1 of 1 paid attempts settled with an on-chain receipt, and 0 of those also returned a 2xx response. settled is the confirmed transfer; delivered is the response arriving. 1 paid attempt is held as inconclusive rather than counted against the seller: a paid request that answered 4xx, settled or not, can be our own request being malformed, because vet402 buys with no API key and sends a request body only when the seller declares one; and a 402 or 5xx from 2026-09-13 to 2026-09-15 came while vet402's own payer wallet was out of USDC. A measurement of what happened when vet402 paid this endpoint, not a recommendation. (api.xona-agent.com · measured 2026-08-24)

[![vet402 receipt](https://vet402.com/api/badge/endpoint/711db3fa-d364-4ad5-88da-7e891aef9ba6.svg)](https://vet402.com/observatory/e/711db3fa-d364-4ad5-88da-7e891aef9ba6)

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

Catalog listing events, newest first
Detected onEventBeforeAfter
2026-09-23relisted{"status":"delisted"}{"status":"active"}
2026-09-15delisted{"status":"active"}{"status":"delisted"}

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 2026-08-24T23:37:10Z (UTC). The form starts with that time; add what you saw instead.

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api.xona-agent.com/base-main/audio/elevenlabs-music — x402 purchase and probe record | vet402