api.particle.pro/v1/topics
1.Catalog declaration
| Resource URL | https://api.particle.pro/v1/topics |
| Source | cdp_bazaar |
| Declared method | GET |
| Network | eip155:8453 |
| Receiving address | 0x59f3a6dcb6f482c53872dd8f8f9e1f9161a1c5f7 |
| Declared price (base units) | 10000 |
| Catalog status | active |
| First seen / last seen | 2026-09-07 01:03 UTC / 2026-09-29 01:03 UTC |
| Catalog-reported calls / payers (30d) | 3 / 3 |
2.Probe history
| Probed at | Method | Verdict | HTTP | Latency | Reason |
|---|---|---|---|---|---|
| 2026-09-28 22:40 UTC | GET | pass | 402 | 122 ms | — |
| 2026-09-28 04:40 UTC | GET | pass | 402 | 2150 ms | — |
| 2026-09-27 13:40 UTC | GET | pass | 402 | 327 ms | — |
| 2026-09-26 16:40 UTC | GET | pass | 402 | 340 ms | — |
| 2026-09-25 22:40 UTC | GET | pass | 402 | 262 ms | — |
| 2026-09-25 04:40 UTC | GET | pass | 402 | 338 ms | — |
| 2026-09-24 13:40 UTC | GET | pass | 402 | 194 ms | — |
| 2026-09-23 16:40 UTC | GET | pass | 402 | 299 ms | — |
| 2026-09-22 22:40 UTC | GET | pass | 402 | 244 ms | — |
| 2026-09-22 04:40 UTC | GET | pass | 402 | 613 ms | — |
| 2026-09-21 13:40 UTC | GET | pass | 402 | 184 ms | — |
| 2026-09-20 22:40 UTC | GET | pass | 402 | 507 ms | — |
| 2026-09-20 04:40 UTC | GET | pass | 402 | 187 ms | — |
| 2026-09-19 13:40 UTC | GET | pass | 402 | 241 ms | — |
| 2026-09-18 16:40 UTC | GET | pass | 402 | 145 ms | — |
| 2026-09-17 22:40 UTC | GET | pass | 402 | 148 ms | — |
| 2026-09-17 12:35 UTC | GET | pass | 402 | 72 ms | — |
| 2026-09-14 11:24 UTC | GET | pass | 402 | 243 ms | — |
| 2026-09-10 11:24 UTC | GET | pass | 402 | 94 ms | — |
| 2026-09-07 11:24 UTC | GET | pass | 402 | 186 ms | — |
3.L1 — real purchases
1 of 1 paid attempts settled with a receipt, and 1 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.
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 no_declaration- the listing declares no output schema to check the response against.
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).
| Attempted at | Result | HTTP | Receipt (tx) | Latency |
|---|---|---|---|---|
| 09-17 06:012026-09-17 06:01 UTC | settled (nonce-bound) | 200 | 0x8bd1d13f…8bf8 | 1271 ms |
| 10000 units (≈ $0.01 USDC) · L2 no_declarationWhose side: no failure (delivered) | ||||
Embed this record
Run this endpoint? Show the settle-through record vet402 measured — the badge reads 1/1 settled · 1 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.
[](https://vet402.com/observatory/e/9e04c6cc-5723-4860-98f7-67cb25e48f60)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 2026-09-17T06:01:14Z (UTC). The form starts with that time; add what you saw instead.