ISIN check

Machine Tool Interface · isin-check

$0.005 / callPaid per call · 0 free tier No signup

Validate an ISIN (ISO 6166) by structure and Luhn mod-10 check digit over the A=10…Z=35 converted string.

Honest Scope Guarantee

Checksum-verifiable: a real check-digit algorithm runs offline, so a malformed or transposed identifier is rejected deterministically. It does NOT prove the account/record exists or that its holder is honest — pair with your existing fraud process.

Run in Playground (Free) Buy Card Credits Agent Quickstart

Quickstart & Execution

cURL (Paid-only route — unauthenticated calls return HTTP 402 Payment Required)

curl -X POST https://api.code402.dev/v1/tools/isin-check/call \
  -H "content-type: application/json" \
  -d '{"isin":"US0378331005"}'

This route is paid-only (0 free calls/day); every unauthenticated request returns an HTTP 402 Payment Required challenge with its payment terms. Machines use USDC on Base; card credits (instant Stripe checkout) are enabled in this deployment. Signed XDR-1 receipts authenticate recorded service claims, not independent settlement, delivery or zero-knowledge proofs.

Input Parameters

Field	Type	Meaning & Constraints
`isin` (REQUIRED)	`string`	12-character ISIN: 2-letter country code + 9 alphanumerics + check digit; spaces allowed.

Response Format

Deterministic JSON payload fields: tool, valid, normalized, country, reason, scope. Paid responses also carry an offline-verifiable receipt object (XDR-1, secp256k1 signature recoverable to the authorized signer).

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