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Asiaref Tax ID / VAT Number Validator
x402
Asiaref Tax ID / VAT Number Validator is a paid API for AI agents from asiaref.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).
Validates Tax ID and VAT numbers for Asian countries using official check-digit algorithms, returning validity status, normalised form, ID type, and failure reason
Price / call$0.003
Success—
StatusUnknown
How this service works
Tax-ID / VAT-number validation for Asian 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 provided tax ID is valid or invalid, the normalised canonical form of the ID, the specific ID type (e.g. business registration, individual taxpayer), and if invalid, a structured reason for failure — all computed via official check-digit algorithms cited to authoritative government sources with dates, without any live registry lookup.
Example use cases
Onboarding vendor tax ID check
“I'm onboarding a new supplier from South Korea with tax ID '123-45-67890' — can you verify it's a valid Korean business registration number and tell me if it passes the official check-digit check?”
Invoice VAT number compliance
“Before I send this invoice, can you validate the Japanese consumption tax ID 'T1234567890123' to make sure it's properly formatted and legitimate?”
E-commerce checkout tax validation
“A customer in Singapore entered their GST registration number 'M90373267L' during checkout — can you verify whether that's a valid Singapore tax ID and what type it is?”
Technical details
Endpoint
GEThttps://asiaref.dev/v1/taxid/validate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, purely algorithmic Tax ID or VAT number validation for Asian countries without performing a live registry lookup. It is ideal for compliance checks during onboarding, invoice validation, or checkout flows where you need format correctness and check-digit verification with citations to official government rules. Prefer this over European VAT validation APIs when your counterparty is in Asia, and over live registry APIs when you only need format/algorithmic correctness rather than real-time registration status.
Side effects
- Missing or unsupported country code — returns error indicating coverage gap
- Malformed input ID that cannot be parsed at all — returns invalid with parse failure reason
- Country not yet covered by the service — returns 404 or unsupported country error
- Network timeout or service unavailability — returns HTTP 5xx
- Incorrect query parameter names — returns 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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