keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunities
1.Catalog declaration
| Resource URL | https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunities |
| Source | cdp_bazaar |
| Declared method | GET |
| Network | eip155:8453 |
| Receiving address | 0xd3fad775704a0ed209315a406c3d99ed589ee723 |
| Declared price (base units) | 2000 |
| Catalog status | active |
| First seen / last seen | 2026-08-14 08:39 UTC / 2026-09-30 01:03 UTC |
| Catalog-reported calls / payers (30d) | 5 / 4 |
2.Probe history
| Probed at | Method | Verdict | HTTP | Latency | Reason |
|---|---|---|---|---|---|
| 2026-09-30 22:40 UTC | GET | pass | 402 | 3037 ms | — |
| 2026-09-30 04:40 UTC | GET | pass | 402 | 1358 ms | — |
| 2026-09-29 13:40 UTC | GET | pass | 402 | 1196 ms | — |
| 2026-09-28 16:40 UTC | GET | pass | 402 | 1166 ms | — |
| 2026-09-27 22:40 UTC | GET | pass | 402 | 1361 ms | — |
| 2026-09-27 04:40 UTC | GET | pass | 402 | 1796 ms | — |
| 2026-09-26 13:40 UTC | GET | pass | 402 | 1059 ms | — |
| 2026-09-25 16:40 UTC | GET | pass | 402 | 1324 ms | — |
| 2026-09-24 22:40 UTC | GET | pass | 402 | 1965 ms | — |
| 2026-09-24 04:40 UTC | GET | pass | 402 | 1319 ms | — |
| 2026-09-23 13:40 UTC | GET | pass | 402 | 1192 ms | — |
| 2026-09-22 16:40 UTC | GET | pass | 402 | 1408 ms | — |
| 2026-09-21 22:40 UTC | GET | pass | 402 | 1290 ms | — |
| 2026-09-21 04:40 UTC | GET | pass | 402 | 1530 ms | — |
| 2026-09-20 13:40 UTC | GET | pass | 402 | 1155 ms | — |
| 2026-09-19 16:40 UTC | GET | pass | 402 | 1662 ms | — |
| 2026-09-18 22:40 UTC | GET | pass | 402 | 1161 ms | — |
| 2026-09-18 04:40 UTC | GET | pass | 402 | 977 ms | — |
| 2026-09-17 13:40 UTC | GET | pass | 402 | 1057 ms | — |
| 2026-09-16 22:40 UTC | GET | pass | 402 | 1634 ms | — |
| 2026-09-15 22:40 UTC | GET | pass | 402 | 837 ms | — |
| 2026-09-15 04:40 UTC | GET | pass | 402 | 947 ms | — |
| 2026-09-14 16:40 UTC | GET | pass | 402 | 1061 ms | — |
| 2026-09-13 22:40 UTC | GET | pass | 402 | 894 ms | — |
| 2026-09-13 13:40 UTC | GET | pass | 402 | 3393 ms | — |
| 2026-09-12 16:40 UTC | GET | pass | 402 | 888 ms | — |
| 2026-09-12 04:40 UTC | GET | pass | 402 | 1281 ms | — |
| 2026-09-11 13:40 UTC | GET | pass | 402 | 1108 ms | — |
| 2026-09-10 23:40 UTC | GET | pass | 402 | 1101 ms | — |
| 2026-09-10 14:40 UTC | GET | pass | 402 | 1056 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.
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).
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 | On-chain tx | Latency |
|---|---|---|---|---|
| 09-18 18:012026-09-18 18:01 UTC | settled (nonce-bound) | 200 | 0x29fb0f55…fe02 | 2842 ms |
| 2000 units (≈ $0.002 USDC) · L2 no_declarationWhose side: no failure (delivered) | ||||
| 09-12 06:012026-09-12 06:01 UTC | settled (nonce-bound) | 200 | 0x58cbf730…bf68 | 1963 ms |
| 2000 units (≈ $0.002 USDC) · L2 no_declarationWhose side: no failure (delivered) | ||||
| 09-03 12:082026-09-03 12:08 UTC | settled (amount + payee) | 200 | 0x7e478dae…5c8b | 2240 ms |
| 2000 units (≈ $0.002 USDC) · L2 no_declarationWhose 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.
[](https://vet402.com/observatory/e/0ce1493b-b9a5-4efd-94a7-c6a5b2c8a92e)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.