ISIN Validator

x402

ISIN Validator is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-15).

Validates an ISIN code (ISO 6166) by checking format, check digit, issuing country, and embedded CUSIP (US/CA) or SEDOL (GB/IE) — computed locally with nothing stored.

Price / call$0.003

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StatusUnknown

How this service works

558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.

Output

A JSON object containing: the original ISIN, validity boolean, country name and code, the embedded NSIN, CUSIP (for US/CA ISINs) with its own validity flag, and the control/check digit.

Example use cases

Pre-trade ISIN compliance check

“Before we place this order, can you verify that ES0113900J37 is a properly formatted and valid ISIN, and tell me which country issued it?”

Extract embedded CUSIP from US ISIN

“I have the ISIN US0378331005 for an Apple security — can you validate it and pull out the embedded CUSIP so I can cross-reference it in another system?”

Data quality check on imported securities list

“We imported a securities record with ISIN GB0002634946 — can you confirm it's a valid ISIN and verify whether the embedded SEDOL-based identifier checks out?”

Technical details

Endpoint

POSThttps://api.vextorium.com/v1/isin-validate?utm_source=zero.xyz

When to prefer

Use this endpoint when you need fast, offline-style validation of ISIN codes without sending data to a third-party registry — ideal for compliance pipelines, data ingestion workflows, or pre-trade checks where latency and privacy matter. Prefer it over manual regex checks because it also validates the Luhn-based check digit and decodes the embedded CUSIP or SEDOL.

Side effects

Malformed ISIN (wrong length or non-alphanumeric characters) returns valid=false
Incorrect check digit returns valid=false with the computed control digit
Unknown or unsupported country prefix may return country as null
Missing required 'isin' field in request body returns a validation error
Non-US/CA ISINs will not include a CUSIP field or valid_cusip flag

Input

Schema · Request body

Field	Type	Description
isin	string	ISIN code, e.g. US0378331005 or ES0113900J37

Output

Schema · Response

{
  "type": "json",
  "example": {
    "isin": "US0378331005",
    "nsin": "037833100",
    "cusip": "037833100",
    "valid": true,
    "country": "United States",
    "valid_cusip": true,
    "country_code": "US",
    "control_digit": "5"
  }
}

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