Directory / checkdigit.openverbs.com
checkdigit.openverbs.com/v1/isbn working
https://checkdigit.openverbs.com/v1/isbn
Before you pay
- Advice
ok- Protocol
- x402 · http · POST
- Asks for
- 0.002 USDC on base
- Catalogue says
- 0.002 USDC
- Pays to
0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A- Last check
- 56 min ago · 398 ms · HTTP 402
- Detail
- 402 with valid terms
Reliability
- Uptime 24 h
- 100.0%
- Uptime 7 days
- 100.0% (71 checks)
- Uptime 30 days
- 100.0% (signed daily)
- Paid calls 30 d
- 1 from 1 payers (x402 Bazaar)
- Listed by
- x402-bazaar
- First seen
- 2026-11-05 22:12 UTC
Description (from the catalogue, unverified)
Validate an ISBN-10 (mod-11, trailing X allowed) or ISBN-13 (GTIN mod-10) book number. Length after removing spaces/hyphens selects the scheme.
Signed history
| When | Statement | Log index |
|---|---|---|
| 2026-11-07 00:18 UTC | b2a81a6f…c30638 daily summary | 150787 |
| 2026-11-06 00:14 UTC | a1deed53…0c50e9 daily summary | 57874 |
Verify any statement offline: how.
For agents and owners
JSON: https://alalanet.com/v1/services/wmo46jxowpymyocs
Badge:
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