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Validate Iban

by 2s in Developer tools

x402 APIPassing, checked 35 min ago

Validate an International Bank Account Number (IBAN) with full ISO 13616 checks: country-specific length and the ISO 7064 mod-97 checksum (not just a regex). Returns {valid, iban (normalized), formatted (4-char groups), countryCode, checkDigits, bban, reason}. Catches transposed digits and wrong-length accounts that a format check misses, and returns the canonical form so a glue/ETL pipeline can validate AND normalize bank details in one deterministic call. ~85 countries. No bank directory lookup — structure + checksum only.

GET https://2s.io/api/validate/iban

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
160 ms typical, 160 ms slowest 5%
Last check
35 min ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://2s.io/api/validate/iban?iban=DE89370400440532013000"
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F2s.io%2Fapi%2Fvalidate%2Fiban
const res = await pay("https://2s.io/api/validate/iban?iban=DE89370400440532013000");
console.log(await res.json());

Example input

{
  "iban": "DE89370400440532013000"
}

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Recent checks

WhenResultHTTPTimePrice
35 min agoPassed402349 ms$0.0025
6 h agoPassed402160 ms$0.0025