# IBAN PL Mod-97 Validator

> IBAN PL Mod-97 Validator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Validates whether a given string is a mod-97-valid Polish IBAN (PL) of exactly 28 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-pl?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/iban-pl-mod-97-validator-7908d542
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0rNS6429GLBicWFEzTqw3

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-pl-mod-97-validator-7908d542 -d '<json body>'
```

Example prompt: Can you check whether PL61109010140000071219812874 is a valid Polish IBAN — specifically that it's 28 characters long and passes the mod-97 checksum?

## When to prefer this

Use this endpoint when you need a quick, authoritative mod-97 checksum validation specifically for Polish (PL) IBANs of exactly 28 characters. Prefer the free sandbox endpoint (/v1/sandbox/check-iban-pl) for development and testing to avoid the $0.001 USDC charge. Choose this over generic IBAN libraries when you need a hosted, stateless validation call within an automated agent workflow.

## Known failure modes

- String shorter or longer than 28 characters returns invalid
- Non-PL country code prefix fails country check
- Correct length but failing mod-97 checksum returns invalid
- Empty or missing value field returns an error
- Malformed JSON body returns a 400-level error

## How this service works

Call when an agent needs whether an IBAN is a mod-97-valid PL number of length 28. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/check-iban-pl first.

## Output

Returns a boolean or structured result indicating whether the supplied string is a valid Polish IBAN: 28 characters long, starts with 'PL', and satisfies the ISO 7064 mod-97-10 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": [
    "PL20AAAA00000000000000000000"
   ],
   "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-pl-mod-97-validator-7908d542/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)