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ISIN Validation (ISO 6166) – Aventtech
x402
ISIN Validation (ISO 6166) – Aventtech is a paid API for AI agents from api.aventtech.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).
Validates a 12-character ISIN code per ISO 6166, checking structure, Luhn check digit, country code, and extracting the embedded NSIN.
Price / call$0.01
Success—
StatusUnknown
How this service works
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 instruments.
Output
Returns whether the ISIN is structurally valid and passes the ISO 6166 Luhn check digit algorithm, along with the extracted 2-letter country code (e.g. US, GB) and the National Securities Identifying Number (NSIN) embedded in the identifier.
Example use cases
Verify securities in bulk trade file
“I'm processing a batch of trades and need you to validate each ISIN identifier in the file — make sure they're all properly formed, pass the Luhn check, and extract the country codes so I can route them to the right settlement desks.”
Compliance screening for bond portfolio
“Can you go through our bond holdings and validate that every ISIN in our portfolio is legitimate according to ISO 6166 standards? I also need the embedded country codes extracted so we can ensure geographic diversification meets our policy requirements.”
Onboard and verify client holdings
“A new client just sent over their investment portfolio list with ISINs — please validate each one to confirm they're real securities identifiers, check the Luhn digits, and pull out the country codes and NSINs so I can reconcile their holdings with our master data.”
Technical details
Endpoint
GEThttps://api.aventtech.com/validate/isin?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to validate a securities ISIN identifier per ISO 6166 — particularly when you need Luhn check-digit verification and extraction of the embedded country code and NSIN. Prefer this over generic regex checks when authoritative structural validation is required for financial data pipelines, trade processing, or compliance workflows.
Side effects
- ISIN not 12 characters returns structural validation failure
- Invalid country code prefix causes rejection
- Luhn check digit mismatch returns checksum failure
- Missing or malformed isin query parameter returns 400 error
- Non-alphanumeric characters in ISIN cause parse error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"nsin": "037833100",
"valid": true,
"countryCode": "US"
}
}Tags
x402
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