Overview
ISSN validation — validates an ISSN (International Standard Serial Number, ISO 3297) via its mod-11 check digit, handling the 'X' check character, and normalizes the NNNN-NNNC format. ISSN identifies
Protocol
x402
Price
$0.0050
Payment Asset
USDC
Payment Network
Base
Category
data
Provider
GoCreative AI
Source
self-registered
Indexed
2026-07-01 19:03:16
Health
Status
healthy
Latency (p50)
218ms
Uptime (30d)
100.0%
Reliability Score
95/100
Last Checked
2026-07-26 07:46:34
Last Healthy
2026-07-26 07:46:34
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-07-26 07:46:34 | healthy | 402 | 474ms | |
| 2026-07-26 04:18:57 | healthy | 402 | 173ms | |
| 2026-07-25 20:04:17 | healthy | 402 | 749ms | |
| 2026-07-25 17:52:56 | healthy | 402 | 218ms | |
| 2026-07-25 14:11:00 | healthy | 402 | 332ms | |
| 2026-07-25 07:50:07 | healthy | 402 | 190ms | |
| 2026-07-25 04:56:04 | healthy | 402 | 178ms | |
| 2026-07-25 01:12:13 | healthy | 402 | 186ms | |
| 2026-07-24 21:05:51 | healthy | 402 | 311ms | |
| 2026-07-24 17:52:09 | healthy | 402 | 479ms | |
| 2026-07-24 12:05:04 | healthy | 402 | 200ms | |
| 2026-07-24 10:23:11 | healthy | 402 | 254ms | |
| 2026-07-24 05:59:13 | healthy | 402 | 186ms | |
| 2026-07-24 01:03:51 | healthy | 402 | 228ms | |
| 2026-07-23 19:49:54 | healthy | 402 | 187ms | |
| 2026-07-23 17:18:57 | healthy | 402 | 432ms | |
| 2026-07-23 11:59:28 | healthy | 402 | 176ms |