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IBAN Validator (ibancheck.hergertsynthora.com)
x402
IBAN Validator (ibancheck.hergertsynthora.com) is a paid API for AI agents from ibancheck.hergertsynthora.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Validates an IBAN string using ISO 13616 mod-97 checksum, country/length registry checks, and extracts BBAN and bank code with canonical formatting
Price / call$0.005
Success—
StatusUnknown
How this service works
Validate any IBAN deterministically: ISO 13616 mod-97 checksum, country + length registry check, BBAN and bank-code extraction. Zero external deps, no hallucination. Ed25519-signed. First 3 calls FREE per wallet (X-WALLET).
Output
Returns a structured validation result including whether the IBAN is valid, the ISO 13616 mod-97 checksum outcome, country code, expected vs actual length, extracted BBAN, bank code, and the canonically formatted IBAN string.
Example use cases
Example prompt
“Can you check whether GB29NWBK60161331926819 is a valid IBAN before I submit the payment?”
Technical details
Endpoint
POSThttps://ibancheck.hergertsynthora.com/serviceWhen to prefer
Use this endpoint when you need deterministic, offline-style IBAN validation with no external banking data dependencies — ideal before initiating SEPA or international payments. Prefer over general-purpose validation libraries when you need structured extraction of BBAN and bank code alongside the validity check, and when a signed, auditable result is required.
Side effects
- Invalid IBAN format returns validation failure with specific error reason (bad checksum, wrong length for country, unsupported country code)
- Malformed JSON input returns 400 error
- Missing 'iban' field returns error indicating required parameter
- Wallet header missing after 3 free calls results in 402 payment required
- Network timeout if service is temporarily unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| iban | string | IBAN to validate (spaces optional) |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "iban_check",
"result": {
"bban": "WEST12345698765432",
"iban": "GB82WEST12345698765432",
"valid": true,
"length": 22,
"country": "GB",
"verdict": "valid",
"bank_code": "WEST",
"formatted": "GB82 WEST 1234 5698 7654 32",
"check_digits": "82",
"country_name": "United Kingdom",
"expected_length": 22
}
}
}Tags
x402
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