x402 price index · endpoint
POST https://rail.akrivis.in/v1/tools/isbn-check/call · tool isbn-check · source registry · id 0d81ba02b1df0e58
- current quote
- 0.000999 USDC declared observed 2026-09-15T18:02:58.000Z
- percentile
- P55 of 197 indexed USDC quotes (share quoting at or below this one; P0 = cheapest)
- inflation flag
- no (latest quote ≤ 1.5× the 30-day median)
- 7-day
- 0.000999 USDC / 0.000999 USDC / 0.000999 USDC min / median / max · 28 obs · change 0.0%
- 30-day
- 0.000999 USDC / 0.000999 USDC / 0.000999 USDC min / median / max · 50 obs · change 0.0%
- first / last seen
- 2026-09-03T14:21:34.000Z / 2026-09-15T18:02:58.000Z
Embed the badge
The badge is served from this index with a 1-hour cache and reads "unknown" whenever there is no data. It links back here so anyone can see the history behind the number.
[](https://index.code402.dev/e/0d81ba02b1df0e58)
<a href="https://index.code402.dev/e/0d81ba02b1df0e58"><img src="https://index.code402.dev/badge/0d81ba02b1df0e58.svg" alt="x402 quoted price for https://rail.akrivis.in/v1/tools/isbn-check/call"></a>
Verify a receipt
Paste the XDR-1 receipt JSON a paid call returned (the X-Receipt header, base64-decoded, or the receipt object inside it). The signer is recovered offline and compared with the signer https://rail.akrivis.in publishes in /.well-known/x402.json. Nothing is sent anywhere else.
Price history (last 50 observations, 30 days)
| observed | quoted | asset | chain | pay to | kind |
|---|---|---|---|---|---|
| 2026-09-15T18:02:58.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-15T12:03:12.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-15T06:02:24.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-15T00:02:51.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-14T18:02:52.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-14T12:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-14T06:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-14T00:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-13T18:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-13T12:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-13T06:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-13T00:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-12T18:02:53.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-12T12:02:24.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-12T06:03:29.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-12T00:02:41.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-11T18:02:31.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-11T12:03:52.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-11T06:03:23.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-11T00:03:25.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-10T18:02:44.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-10T12:02:44.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-10T06:02:57.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-10T00:03:44.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-09T18:03:15.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-09T12:03:14.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-09T06:03:00.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-09T00:03:12.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-08T18:03:11.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-08T12:03:00.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-08T06:03:00.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-08T00:02:49.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-07T18:02:50.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-07T12:03:28.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-07T06:03:57.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-07T00:03:02.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-06T18:03:02.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-06T12:02:38.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-06T06:03:23.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-06T00:03:20.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-05T18:03:21.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-05T12:02:56.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-05T06:02:24.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-05T00:02:26.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-04T18:02:25.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-04T12:02:25.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-04T06:02:25.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-04T00:02:24.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-03T18:02:26.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
| 2026-09-03T14:21:34.000Z | 0.000999 USDC | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | 8453 | 0xc59c85e661d34084a7769f955d17fd38254a6235 | declared |
Raw JSON: /v1/history · /v1/price