# Slovenian IBAN (SI) Mod-97 Validator

> Slovenian IBAN (SI) Mod-97 Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).

Validates whether a given string is a mod-97-valid Slovenian IBAN (SI) with the correct length of 19 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-si?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/slovenian-iban-si-mod-97-validator-6d660ada
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I1R-C4t5tXUKKDq5imcpf

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 slovenian-iban-si-mod-97-validator-6d660ada -d '<json body>'
```

Example prompt: Can you check whether SI56 1910 0000 0123 438 is a valid Slovenian IBAN — specifically that it passes the mod-97 checksum and is the right 19-character SI format?

## When to prefer this

Choose this endpoint when you specifically need to validate a Slovenian (SI) IBAN and require mod-97 checksum verification alongside length and country-code checks. Use the free sandbox endpoint (POST /v1/sandbox/check-iban-si) first to avoid the $0.003 USDC charge during development or testing. For other country IBANs, use the corresponding country-specific sibling endpoints on the same host.

## Known failure modes

- IBAN string too short or too long (not 19 characters) — returns invalid
- Wrong country code prefix (not SI) — returns invalid
- Mod-97 checksum fails — returns invalid
- Empty or missing value field — request rejected
- Value exceeds 20000 character limit — request rejected

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid SI number of length 19. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-iban-si first.

## Output

Returns a boolean or structured result indicating whether the provided string is a valid Slovenian IBAN: correct SI country code prefix, exactly 19 characters long, and passing the mod-97 checksum algorithm. Invalid IBANs or malformed inputs return a failure/false result.

## 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": [
    "SI15AAAA00000000000"
   ],
   "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/slovenian-iban-si-mod-97-validator-6d660ada/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)