🏦IBAN Validator
Validate an International Bank Account Number: country code, country-specific length and the ISO 7064 MOD 97-10 check digits — with the pretty-printed grouping returned when valid.
Worked examples
Valid German IBAN
GET /api/v1/finance/iban-validator?iban=DE89%203704%200044%200532%200130%2000
Result: ✓ Valid IBAN — Germany
Valid UK IBAN
GET /api/v1/finance/iban-validator?iban=GB29%20NWBK%206016%201331%209268%2019
Result: ✓ Valid IBAN — United Kingdom
Bad checksum
GET /api/v1/finance/iban-validator?iban=DE89%203704%200044%200532%200130%2001
Result: ✗ Invalid IBAN
Machine API (x402)
$0.001 / callThis tool is also a JSON API for AI agents. Requests without payment receive 402 Payment Required plus instructions; agents pay USDC on Base via the x402 protocol — no accounts, no API keys.
GET /api/v1/finance/iban-validator?iban=DE89%203704%200044%200532%200130%2000 HTTP/1.1
Host: agenttools-hub.vercel.app
→ 402 (payment required, instructions in headers)
→ 200 (after X-PAYMENT header; JSON body below)
{
"tool": "finance/iban-validator",
"input": {"iban":"DE89 3704 0044 0532 0130 00"},
"result": { "value": 1, "answer": "✓ Valid IBAN — Germany" }
}Agent docs: /llms.txt · OpenAPI spec · integration guide
About this tool
Validation runs three checks: structural format, the country's official length (48 countries built in), and the ISO 7064 MOD 97-10 checksum that catches typos in account numbers. A valid result means well-formed — it does not prove the account exists.
rearrange (BBAN + country + check digits) → letters A=10…Z=35 → value mod 97 must equal 1
Frequently asked questions
Does a valid IBAN mean the account exists?
No. The checksum only detects typos. Whether the account is open and reachable requires a bank-side lookup or confirmation-of-payee service.
Why is my US account rejected?
The US has no IBAN system — US banks use ABA routing + account numbers. Only ~90 countries participate in the IBAN registry.