Agent402 ISIN Validator

x402

Agent402 ISIN Validator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status down (last checked 2026-10-12).

Validates a 12-character ISIN string against ISO 6166 format rules and Luhn check digit — returns country code, NSIN, and per-check results.

Price / call$0.001

Seller volume →—

Success—

StatusDown

How this service works

Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.

Output

A JSON object with: `valid` (overall pass/fail boolean), `valid_format` (ISO 6166 12-char structure check), `valid_checksum` (Luhn digit check), `country` (2-letter ISO country code from the ISIN prefix), `nsin` (the 9-character national securities identifier portion), and `provenance.depth` indicating this is a local checksum-only check (not a live registry or exchange lookup).

Example use cases

Pre-trade securities ID gate

“Before sending this order, check that the ISIN IE00B4L5Y983 is structurally valid — correct format and Luhn check digit — so we don't reject it downstream.”

Bulk data pipeline ISIN scrub

“I've got an ISIN I scraped from a data feed: GB0002634946 — can you validate the format and checksum so I can decide whether to keep or discard this record?”

Compliance form ISIN verification

“A user just typed DE0005140008 into our compliance form as a securities identifier — verify it's a properly formatted ISIN with a valid check digit before we save it.”

Technical details

Endpoint

POSThttps://agent402.co.uk/v1/validate/isin?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a fast, cheap ($0.001) structural and checksum gate on an ISIN before submitting to a downstream system, and you do NOT need live exchange listing confirmation or CUSIP/SEDOL registry lookup. It is ideal for data pipeline scrubbing, form validation, or compliance pre-checks where ISO 6166 format correctness and Luhn integrity are sufficient.

Side effects

Input ISIN is not exactly 12 characters — returns valid:false with format failure
Non-alphanumeric characters in ISIN — format check fails
Correct format but wrong Luhn check digit — valid_format:true but valid_checksum:false and valid:false
Unknown or invalid country prefix — may still pass checksum but country field reflects raw prefix
Missing or empty isin field — likely 4xx error or validation failure response
Payment failure (402) if x402 authorization header is not provided or insufficient USDC balance

Input

Schema · Request body

Field	Type	Description
isin	string	12-char ISIN (e.g. US0378331005)

Output

Schema · Response

{
  "type": "json",
  "example": {
    "nsin": "037833100",
    "valid": true,
    "country": "US",
    "provenance": {
      "depth": "checksum_only"
    },
    "valid_format": true,
    "valid_checksum": true
  }
}

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