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IBAN Structural Validator
x402
IBAN Structural Validator is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).
Validates an IBAN string offline using ISO 13616 checksum and per-country structure/length rules, returning a validity flag and granular error details on failure.
Price / call$0.003
Success—
StatusUnknown
How this service works
Cheap structural IBAN validation: ISO 13616 checksum + per-country structure/length. Returns valid plus, on rejection, a granular error_type (invalid_checksum, invalid_length, invalid_structure, invalid_country), the country and the format spec. Offline (schwifty, MIT); no network or keys. A cheap-first entry before the fuller /bank/verify fusion route.
Output
Returns a boolean valid field. On failure, includes an error_type enum (invalid_checksum, invalid_length, invalid_structure, or invalid_country), the detected country code, and the expected format specification for that country.
Example use cases
Example prompt
“Can you check if this IBAN is valid: GB29 NWBK 6016 1331 9268 19? If it's not, tell me exactly what's wrong with it.”
Technical details
Endpoint
GEThttps://api.agentstools.dev/bank/validate?utm_source=zero.xyzWhen to prefer
Use this as a cheap, fast, offline first-pass validation before calling a more expensive bank verification or fusion route. Ideal when you just need structural/checksum correctness without live bank reachability checks, and no API keys or network calls are desired. At $0.003 it is the cheapest gate to eliminate obviously malformed IBANs early.
Side effects
- IBAN with invalid checksum returns valid=false and error_type=invalid_checksum
- IBAN with wrong length for its country returns error_type=invalid_length
- Malformed structure (bad character positions) returns error_type=invalid_structure
- Unknown or unsupported country code prefix returns error_type=invalid_country
- Missing iban query parameter returns a 400 or schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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