Directory / hcrb.in
hcrb.in/v1/tools/isbn-check/call working
https://hcrb.in/v1/tools/isbn-check/call
Before you pay
- Advice
ok- Protocol
- x402 · http · POST
- Asks for
- 0.005 USDC on base
- Catalogue says
- 0.005 USDC
- Pays to
0xc59c85e661d34084a7769f955d17fd38254a6235- Last check
- 25 min ago · 766 ms · HTTP 402
- Detail
- 402 with valid terms
Reliability
- Uptime 24 h
- 100.0%
- Uptime 7 days
- 99.7% (302 checks)
- Uptime 30 days
- 99.6% (signed daily)
- Paid calls 30 d
- 2 from 2 payers (x402 Bazaar)
- Listed by
- x402-bazaar
- First seen
- 2026-11-05 22:11 UTC
Description (from the catalogue, unverified)
Validate an ISBN-10 (mod-11) or ISBN-13 (1,3-weight mod-10) checksum.
Signed history
| When | Statement | Log index |
|---|---|---|
| 2026-11-12 00:16 UTC | 9612e484…6f9fe6 daily summary | 533994 |
| 2026-11-11 00:16 UTC | e1cb4aa7…6bad8e daily summary | 453636 |
| 2026-11-10 00:16 UTC | 81f31b88…2aa24e daily summary | 370753 |
| 2026-11-09 00:14 UTC | bf79296f…f40970 daily summary | 279642 |
| 2026-11-08 00:11 UTC | 9013dfc2…b54241 daily summary | 201289 |
| 2026-11-07 00:14 UTC | 21cf691d…2f384a daily summary | 122158 |
| 2026-11-06 20:24 UTC | 09d24f94…78f5f8 status change | 86221 |
| 2026-11-06 19:54 UTC | 37ff0b56…ab1d4a status change | 85592 |
| 2026-11-06 00:11 UTC | 3735fffb…580f7e daily summary | 32726 |
Verify any statement offline: how.
For agents and owners
JSON: https://alalanet.com/v1/services/jlttvhf7xxpkskpl
Badge:
<a href="https://alalanet.com/s/jlttvhf7xxpkskpl"><img src="https://alalanet.com/badge/jlttvhf7xxpkskpl" alt="alalanet status"></a>Own this service? Claim it (free). Do not want it checked? See the prober page.