Tanod utilpeek — Identifier Format Validator

x402

Tanod utilpeek — Identifier Format Validator is a paid API for AI agents from tanod.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).

Validates the format and check digits of financial, business, and national identifiers (IBAN, BIC, EU VAT, ISBN, ISSN, EAN, ISIN, LEI, IMO, and national tax/business IDs) without performing live registry or existence lookups.

Price / call$0.001

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StatusUnknown

How this service works

One MCP server and HTTP API with 193 pay-per-call tools for AI agents (security checks, chain data, finance, aviation, documents), plus free uptime and MikroTik monitoring and 130+ free browser tools. No signup; free daily tier. Operated by an AI.

Output

Returns whether the submitted identifier passes format rules and check digit verification for its declared type. The response indicates validity (true/false) and may include details on why a value fails (e.g. wrong length, invalid check digit, unrecognized country prefix). No live registry or government database is consulted.

Example use cases

IBAN format check before wire transfer

“Before I submit this payment, can you verify that the IBAN DE89370400440532013000 is properly formatted and has correct check digits?”

EU VAT number format validation

“I need to check whether this EU VAT number — FR83404833048 — is valid in terms of format; just the format check, not a VIES registry lookup.”

ISIN check digit verification for securities

“Can you validate the format and check digit of this ISIN: US0378331005? I want to make sure it's well-formed before adding it to our database.”

Technical details

Endpoint

POSThttps://tanod.dev/v1/validate?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need fast, offline-style format and check digit validation for financial or business identifiers without triggering live registry lookups (no VIES, no SWIFT, no GLEIF live query). Ideal for pre-flight checks in payment pipelines, data ingestion pipelines, or compliance workflows where you want to catch malformed IDs early at low cost ($0.001/call). Prefer alternatives when you need to confirm an identifier actually exists and is registered with a relevant authority.

Side effects

Invalid kind enum value — returns error if the kind is not one of the supported identifier types
Value too long or contains non-printable characters — rejected by schema validation
Payment card numbers submitted — explicitly not accepted, will be rejected
Correct format but non-existent entity — this endpoint cannot detect non-existent accounts or revoked registrations
Network timeout — rare but possible, retry recommended
Ambiguous identifier submitted without specifying kind — must declare type explicitly

Input

Schema · Request body

Field	Type	Description
kind	string	Identifier kind: iban, bic, vat (EU, format only, no VIES call), isbn, issn, ean, isin, lei, imo, luhn (generic mod-10 check digit), or a national format (au_abn, br_cnpj, br_cpf, ca_bn, ch_uid, de_idnr, es_nif, fr_siren, fr_siret, gb_vat, in_pan, mx_rfc, nl_bsn, us_ein). Payment card numbers are not accepted.
value	string	The identifier (1-64 printable ASCII characters; spaces, - . / allowed).

Output

Schema · Response

{
  "type": "json",
  "example": {
    "kind": "iban",
    "note": "Format and check-digit validation only, computed offline: a valid result does not mean the identifier exists, is assigned or is active (no registry, bank, VIES or card-network lookup is made).",
    "label": "International Bank Account Number",
    "valid": true,
    "detail": {
      "bban": "WEST12345698765432",
      "country": "GB",
      "bank_code": "WEST",
      "branch_code": "123456",
      "check_digits": "82",
      "country_name": "United Kingdom"
    },
    "reason": null,
    "source": {
      "url": "https://arthurdejong.org/python-stdnum/",
      "library": "python-stdnum 2.2",
      "license": "LGPL-2.1-or-later (unmodified dependency)"
    },
    "compact": "GB82WEST12345698765432",
    "formatted": "GB82 WEST 1234 5698 7654 32"
  }
}

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