# Delx Commerce IBAN Checksum Validator

> Delx Commerce IBAN Checksum Validator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Validates an IBAN string by verifying its checksum, returning a boolean validity result

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/iban-checksum?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-iban-checksum-validator-4c1b12f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nc3pfhJsMKsPtvlt4cfpX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-iban-checksum-validator-4c1b12f5 -d '<json body>'
```

Example prompt: Can you check if this IBAN is valid: GB29NWBK60161331926819?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call IBAN checksum check with no signup or subscription required, especially in agent workflows that need to validate IBANs on-demand before initiating international payments. Suitable when cost certainty ($0.001 per call) and verifiable delivery via x402 matter.

## Known failure modes

- Missing or empty IBAN input — likely returns a validation error or bad request
- Malformed IBAN with unsupported country code — may return valid:false or an error
- Payment failure via x402 if USDC funds are insufficient — request is not processed
- Network timeout or service unavailability — no result returned

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

A JSON object with a 'valid' boolean indicating whether the IBAN checksum is correct, plus a 'schema' field identifying the response format as 'delx/util-iban-checksum/v1'.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "iban": {
   "type": "string",
   "description": "IBAN string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true,
  "schema": "delx/util-iban-checksum/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-iban-checksum-validator-4c1b12f5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)