# IBAN Dominican Republic (DO) Mod-97 Validator

> IBAN Dominican Republic (DO) 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 Dominican Republic IBAN of exactly 28 characters

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/check-iban-do?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-dominican-republic-do-mod-97-validator-e0dbdf17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ld-8EA8Ua05Qwrcv5zQNp

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-dominican-republic-do-mod-97-validator-e0dbdf17 -d '<json body>'
```

Example prompt: Can you check if 'DO28 9999 1234 5678 9012 3456 78' is a valid Dominican Republic IBAN — specifically that it's 28 characters long and passes the mod-97 checksum?

## When to prefer this

Use this endpoint when you specifically need to validate a Dominican Republic (DO) IBAN for mod-97 correctness and exact 28-character length. Prefer the free sandbox endpoint (/v1/sandbox/check-iban-do) for testing or high-volume checks. Choose this over generic IBAN validators when you want a lightweight, single-country, deterministic check with no LLM or network side-effects.

## Known failure modes

- Input string is not 28 characters — returns invalid
- Country code is not DO — returns invalid or error
- Mod-97 checksum fails — returns invalid
- Empty or missing value field — request error
- Malformed JSON body — 400 bad request
- Payment not attached — 402 Payment Required (use sandbox endpoint for free testing)

## How this service works

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

## Output

Returns a boolean or structured response indicating whether the input string is a valid Dominican Republic IBAN: exactly 28 characters, country code DO, and passing 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": [
    "DO22AAAA00000000000000000000"
   ],
   "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-dominican-republic-do-mod-97-validator-e0dbdf17/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)