x402-echo-service.onrender.com/chain/gas
1.Catalog declaration
| Resource URL | https://x402-echo-service.onrender.com/chain/gas |
| Source | cdp_bazaar |
| Declared method | POST |
| Network | eip155:8453 |
| Receiving address | 0x9cc774a8ed49d89cba1a288f4a050b8f7fba77ee |
| Declared price (base units) | 1000 |
| Catalog status | active |
| First seen / last seen | 2026-08-31 01:03 UTC / 2026-10-20 01:01 UTC |
| Catalog-reported calls / payers (30d) | 4 / 4 |
2.Probe history
| Probed at | Method | Verdict | HTTP | Latency | Reason |
|---|---|---|---|---|---|
| 2026-10-16 15:40 UTC | POST | pass | 402 | 230 ms | — |
| 2026-10-15 03:40 UTC | POST | pass | 402 | 2541 ms | — |
| 2026-10-13 21:40 UTC | POST | pass | 402 | 383 ms | — |
| 2026-10-12 15:40 UTC | POST | pass | 402 | 134 ms | — |
| 2026-10-11 15:40 UTC | POST | pass | 402 | 127 ms | — |
| 2026-10-10 15:40 UTC | POST | pass | 402 | 164 ms | — |
| 2026-10-09 12:40 UTC | POST | pass | 402 | 3956 ms | — |
| 2026-10-08 04:40 UTC | POST | pass | 402 | 230 ms | — |
| 2026-10-07 04:40 UTC | POST | pass | 402 | 66 ms | — |
| 2026-10-06 13:40 UTC | POST | pass | 402 | 109 ms | — |
| 2026-10-04 22:40 UTC | POST | pass | 402 | 95 ms | — |
| 2026-10-04 04:40 UTC | POST | pass | 402 | 2085 ms | — |
| 2026-10-03 13:40 UTC | POST | pass | 402 | 120 ms | — |
| 2026-10-02 13:40 UTC | POST | pass | 402 | 89 ms | — |
| 2026-10-01 16:40 UTC | POST | pass | 402 | 52 ms | — |
| 2026-09-30 22:40 UTC | POST | pass | 402 | 558 ms | — |
| 2026-09-30 04:40 UTC | POST | pass | 402 | 340 ms | — |
| 2026-09-29 13:40 UTC | POST | pass | 402 | 1948 ms | — |
| 2026-09-28 16:40 UTC | POST | pass | 402 | 94 ms | — |
| 2026-09-27 22:40 UTC | POST | pass | 402 | 259 ms | — |
| 2026-09-27 04:40 UTC | POST | pass | 402 | 74 ms | — |
| 2026-09-26 13:40 UTC | POST | pass | 402 | 266 ms | — |
| 2026-09-25 16:40 UTC | POST | pass | 402 | 368 ms | — |
| 2026-09-24 22:40 UTC | POST | pass | 402 | 166 ms | — |
| 2026-09-24 04:40 UTC | POST | pass | 402 | 152 ms | — |
| 2026-09-23 13:40 UTC | POST | pass | 402 | 195 ms | — |
| 2026-09-22 16:40 UTC | POST | pass | 402 | 247 ms | — |
| 2026-09-21 22:40 UTC | POST | pass | 402 | 228 ms | — |
| 2026-09-21 04:40 UTC | POST | pass | 402 | 239 ms | — |
| 2026-09-20 16:40 UTC | POST | pass | 402 | 396 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.
L2 match- the response parsed as JSON and had the keys the listing marks as required. With an example that marks no key as required, a JSON object or array is enough.
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 |
|---|---|---|---|---|
| 09-17 15:232026-09-17 15:23 UTC | settled (nonce-bound) | 200 | 0x251eefd0…d26c | 1395 ms |
| 1000 units (≈ $0.001 USDC) · L2 matchWhose side: no failure (delivered) | ||||
| 09-11 01:012026-09-11 01:01 UTC | settled (nonce-bound) | 200 | 0x8c703e4d…4233 | 1728 ms |
| 1000 units (≈ $0.001 USDC) · L2 matchWhose side: no failure (delivered) | ||||
| 09-04 12:082026-09-04 12:08 UTC | settled (nonce-bound) | 200 | 0x4397cb78…3dc3 | 1458 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 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/8baa1537-2a68-44d3-a05c-55456d2ec9de)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.