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Delx IBAN Checksum Validator
x402
Delx IBAN Checksum Validator is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Validates an IBAN string by verifying its checksum, returning a boolean validity result.
Price / call$0.001
Success—
StatusUnknown
How this service works
Validate IBAN checksum (mod 97) offline. Call when payment form validation without banking APIs. Returns valid boolean as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Output
Returns a JSON object with a boolean 'valid' field indicating whether the IBAN checksum is correct, and a 'schema' field identifying the response format as 'delx/util-iban-checksum/v1'.
Example use cases
Pre-payment IBAN verification
“Before we send the wire transfer, check if the recipient IBAN DE89370400440532013000 is valid so we don't waste the transaction.”
Payment form input validation
“A user just entered the IBAN FR7630006000011234567890189 in our checkout form — can you verify the checksum is correct before we let them proceed?”
Bulk payout data cleanup
“We have a supplier IBAN NL91ABNA0417164300 in our system — validate it so we know whether to flag it for review before running payouts.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/iban-checksumWhen to prefer
Use this endpoint when you need a lightweight, low-cost (sub-cent) IBAN checksum check without a full banking API integration — ideal for pre-validating user-supplied IBANs before initiating payments, cleaning financial datasets, or gating form submissions. Prefer this over full payment processors when you only need structural IBAN validation, not account existence or reachability checks.
Side effects
- Missing or empty 'iban' field returns a validation error
- Malformed or non-IBAN string may return valid:false rather than an error
- Network timeout on rare occasions causing request failure
- Invalid JSON body in request returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| iban | string | IBAN string |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"schema": "delx/util-iban-checksum/v1"
}
}Tags
x402
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