api.aventtech.com
Validate an ISIN securities identifier (ISO 6166) and check whether it is valid. Verifies structure and the Luhn check digit and extracts the country code and NSIN. Instant ISIN validation and verification for stocks, bonds and financial in
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 417 ms
- Price
- $0.010 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 3
- Category
- Stock prices
- Address
- https://api.aventtech.com/validate/isin
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/dda3387b92cd.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).