# IBAN IS (Iceland) Validator

> IBAN IS (Iceland) Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Validates whether a given string is a mod-97-compliant Icelandic (IS) IBAN of length 26

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-is?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/iban-is-iceland-validator-62289fe6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9SbrvVAOcckY2JXCBr90T

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 iban-is-iceland-validator-62289fe6 -d '<json body>'
```

Example prompt: Can you check whether 'IS140159260076545510730339' is a valid Icelandic IBAN — does it pass the mod-97 check and is it the right 26-character IS format?

## When to prefer this

Use this endpoint when you specifically need to validate an Icelandic (IS) IBAN of exactly 26 characters with a mod-97 checksum. Prefer this over generic IBAN libraries when you need a lightweight, pay-per-use serverless check without bundling a full IBAN library. Note: try the free sandbox endpoint POST /v1/sandbox/check-iban-is before calling this paid endpoint to avoid unnecessary $0.01 charges.

## Known failure modes

- Input string is null or empty — validation fails
- IBAN does not start with 'IS' country code — rejected as wrong country
- IBAN length is not exactly 26 characters — fails length check
- Mod-97 checksum fails — IBAN flagged as invalid
- Non-alphanumeric characters in IBAN — parsing error
- Network timeout or service unavailability — HTTP 5xx error
- Payment not fulfilled (x402 micropayment not sent) — HTTP 402 error

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid IS number of length 26. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/check-iban-is first.

## Output

Returns whether the submitted string is a valid Icelandic (IS) IBAN: specifically that it is exactly 26 characters long, starts with the 'IS' country code, and passes the mod-97 checksum algorithm.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "description": "JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN."
  },
  "value": {
   "type": "string",
   "examples": [
    "IS19AAAA000000000000000000"
   ],
   "maxLength": 20000,
   "minLength": 1,
   "description": "Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar."
  },
  "schema": {
   "description": "JSON Schema document for schema-check SKUs. Omit it on string checks."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/iban-is-iceland-validator-62289fe6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)