validate-isin
ISIN (ISO 6166 security identifier) Luhn checksum validation.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 73 ms
- Price
- $0.001 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 3
- Category
- Security and audits
- Address
- https://x402.agentindex.world/validate/isin
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/1cde9efcfb98.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).