# Strale VAT Validation

> Strale VAT Validation is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0216/call, status unknown (last checked 2026-09-13).

Validates EU VAT numbers including country prefix against official registries and returns structured compliance data with a cryptographic audit record

## Facts

- Endpoint: GET https://api.strale.io/x402/v2/vat-validate
- Price: $0.0216/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/strale-vat-validation-8e9d0a5f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BQSO-4R-eDY1Ipwk8nkk5

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 strale-vat-validation-8e9d0a5f
```

Example prompt: Can you check whether the VAT number SE556703748501 is valid and currently registered?

## When to prefer this

Choose this endpoint when you need authoritative EU VAT number validation with a built-in audit trail suitable for compliance documentation. It is especially useful in B2B invoicing workflows, vendor onboarding, or e-commerce tax exemption verification where a cryptographic record of the check is required. Prefer this over manual VIES lookups when you need structured JSON output and automated audit logging.

## Known failure modes

- Invalid VAT number format — number does not match expected country prefix pattern
- VAT number not found in registry — may be inactive, cancelled, or non-existent
- Country prefix not supported — only EU member state VAT numbers are supported
- Rate limit or payment failure — x402 micropayment not processed
- External registry temporarily unavailable — VIES or national registry downtime

## How this service works

The trust layer for AI agents — 250+ independently tested data capabilities across 27 countries. Execute capabilities via REST, MCP, A2A, or x402 micropayments. Every call returns an audit record with cryptographic chain hashing.

## Output

Returns a structured JSON object indicating whether the VAT number is valid and active, along with the registered company name and address where available, country of registration, and a cryptographic audit record with chain hash for compliance documentation.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ]
    },
    "queryParams": {
     "type": "object",
     "required": [
      "vat_number"
     ],
     "properties": {
      "vat_number": {
       "type": "string",
       "description": "EU VAT number including country prefix (e.g. SE556703748501)"
      }
     }
    }
   },
   "required": [
    "type",
    "method"
   ],
   "additionalProperties": false
  }
 },
 "required": [
  "input"
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/strale-vat-validation-8e9d0a5f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)