# Ausref Tax ID Validator — Australasia

> Ausref Tax ID Validator — Australasia is a paid API for AI agents from ausref.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).

Validates tax IDs and VAT numbers for Australasian countries using official check-digit algorithms, returning validity status, normalised form, ID type, and failure reason

## Facts

- Endpoint: GET https://ausref.dev/v1/taxid/validate?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ausref-tax-id-validator-australasia-0c70bc1a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K4WnQHeTMS1nYvutVVPtZ

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 ausref-tax-id-validator-australasia-0c70bc1a
```

Example prompt: Can you validate this Australian Business Number for me — 51 824 753 556 — and tell me whether it's valid, what type it is, and if it's wrong, why it failed?

## When to prefer this

Choose this endpoint when you need algorithmic tax ID validation for Australasian countries (Australia, New Zealand, Fiji, Papua New Guinea, and others in Oceania) without requiring a live registry lookup. Ideal for onboarding flows, invoice validation, and compliance checks where you need the official check-digit result and a cited failure reason. Prefer over generic international VAT validators when the country is in Oceania and you need source-cited, jurisdiction-specific rules.

## Known failure modes

- Unsupported country code — country not in Ausref coverage list returns an error or empty result
- Malformed query parameters — missing 'country' or 'id' param returns 400
- Ambiguous ID format that cannot be parsed returns invalid with a parse-failure reason
- Network timeout or service unavailability returns 5xx
- Payment not provided or insufficient balance returns 402

## How this service works

Tax-ID / VAT-number validation for Australasian countries: valid/invalid, normalised form, id type and the reason it failed. Format plus the official check-digit algorithm where the tax authority publishes one; every rule cited to an official source with its date. Pure algorithmic, no registry lookup

## Output

Returns a JSON object indicating whether the tax ID is valid or invalid, the normalised (canonical) form of the ID, the detected ID type (e.g. ABN, TFN, IRD), and if invalid, a human-readable reason for failure citing the specific rule or check-digit algorithm that was violated. All rules are traceable to official government sources with dates.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "country",
      "id"
     ],
     "properties": {
      "id": {
       "type": "string",
       "description": "The tax ID / VAT number as written (spaces, dots, dashes and the VAT country prefix are accepted)"
      },
      "country": {
       "type": "string",
       "description": "ISO 3166-1 alpha-2 country code on this brand (see GET /v1/taxid/coverage)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ausref-tax-id-validator-australasia-0c70bc1a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ausref.dev](https://www.zero.xyz/host/ausref.dev/llms.txt)