Validate any IBAN deterministically: ISO 13616 mod-97 checksum, country + length registry check, BBAN andGET /service · x402 API by ibancheck
Validate any IBAN deterministically: ISO 13616 mod-97 checksum, country + length registry check, BBAN and bank-code extraction, canonical formatting. Zero external dependencies, no hallucination, always available. Use it to validate a bank account before initiating a SEPA/international payment. Ed25519-signed. 0.001 USDC on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<your Base address> (no payment); then per call.
What does this x402 API do?
Validate any IBAN deterministically: ISO 13616 mod-97 checksum, country + length registry check, BBAN and. This is an x402-gated GET API resource from ibancheck. TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-07-21. The listing records $0.001 USD-denominated per request on Base. No settled paid call has been verified.
- Published price
- $0.001 USD-denominated per request
- Networks
- Base
- Latest evidence
- TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-07-21
- Resource ID
- 942e5659be1e6dda58ecfa63
Start with a quote-only recipe. Payment signing stays in your project.
const response = await fetch("https://ibancheck.hergertsynthora.com/service", {
method: "GET",
});
console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));
// A valid 402 is a quote, not a completed paid call.This sends no payment. Inspect the 402 response before adding a wallet-enabled client.
- Live 402 quote confirmed
GET returned a protocol-valid 402 quote (402). No payment was made.
- Origin reachable
HEAD https://ibancheck.hergertsynthora.com/ returned 404.
- Observed in 402-index
Discovered through bazaar.
What evidence supports this listing?
Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call. Read the discovery and verification methodology →
Which networks and payment options does it accept?
The normalized listing price is $0.001 USD-denominated per request. Raw protocol requirements remain visible below for implementation and audit use.