Enterprise-grade tax ID validation API with audit-grade evidence, global coverage, and never-block guarantee. Perfect for invoicing, checkout flows, and compliance.
Built for businesses that need reliable tax validation without the complexity
Returns provisional status when authorities are slow, ensuring checkout flows never break. Revenue first, compliance second.
Cryptographically signed evidence with immutable storage. PDF reports with verification hashes for compliance teams.
All 27 EU countries via VIES, UK HMRC, Australian ABN, with more regions coming soon. Single API, global reach.
Built on Cloudflare Workers edge network. Sub-100ms response times globally with intelligent caching.
API key authentication, rate limiting, idempotency protection. SOC 2 compliant infrastructure.
Live authority status monitoring with circuit breakers. Automatic failover ensures maximum uptime.
Comprehensive tax ID validation across major business regions
VAT validation via HMRC OAuth API with official reference numbers and real-time verification.
ABN lookup with checksum validation and GST registration status checking.
Try our API with real tax IDs from actual businesses. No API key required for demo.
Submit the form to see the API response
Simple REST API with comprehensive validation and evidence features
Get started with a simple POST request:
curl -X POST "https://taxidvalidator.com/v1/tax-id/validate" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"country": "NL",
"id": "NL002065538B01",
"evidence_pdf": true
}'Required fields for validation:
{
"country": "NL", // 2-letter country code
"id": "NL002065538B01", // Tax ID to validate
"evidence_pdf": true, // Generate PDF evidence
"timeout_ms": 5000 // Optional timeout
}Valid tax ID with entity details:
{
"status": "valid",
"source": "VIES",
"entity": {
"legal_name": "KONINKLIJKE PHILIPS N.V.",
"address": "HIGH TECH CAMPUS 52, EINDHOVEN"
},
"evidence": {
"reference": "abc123",
"pdf_url": "/v1/evidence/abc123/pdf",
"checked_at": "2025-09-09T12:00:00Z"
}
}API key authentication required:
Authorization: Bearer tiv_your_api_key_here
// Demo mode (no key required):
Authorization: Bearer demo
Referer: https://taxidvalidator.comPossible validation outcomes:
Download audit-grade evidence:
GET /v1/evidence/{checkId}/pdf
Authorization: Bearer YOUR_API_KEY
// Returns: PDF document with:
// - Validation details
// - Entity information
// - Cryptographic hashes
// - Authority referencesPay only for what you use. No hidden fees, no surprises.