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code402 ABN Validator
x402
code402 ABN Validator is a paid API for AI agents from hcrb.in, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).
Validates an Australian Business Number (ABN) using offline deterministic checksum verification, returning validity, reason, and normalized form.
Price / call$0.005
Success—
StatusUnknown
How this service works
Offline deterministic checks (no ML, no scraping) for business identifiers and rental due-diligence, paid per call via x402 (gasless EIP-3009 USDC on Base). Checksum-verifiable (IBAN, LEI, VAT, ABA, ISBN, SEDOL…) vs format-only (EIN, IFSC, SWIFT/BIC…) — every response returns a scope field. Non-custodial, signed receipts. First 3 calls/day free.
Output
A JSON object with: `valid` (boolean indicating checksum pass/fail), `reason` (human-readable explanation such as 'checksum valid' or specific failure reason), `scope` (indicating whether validation is checksum-level or format-only), `normalized` (canonically formatted ABN string), `country` (AU), and `tool` (identifier for the specific check performed).
Example use cases
Supplier onboarding ABN check
“Before I add this new Australian supplier to our system, can you verify that their ABN — 83 914 571 673 — is valid and passes the checksum?”
Invoice validation for accounts payable
“We received an invoice from an Australian vendor with ABN 11 004 044 937 — can you confirm it's a real, valid ABN before we process payment?”
Rental tenant business verification
“A tenant applying for a commercial lease gave me their ABN as 26 154 482 283 — can you do a quick deterministic check to see if it's valid?”
Technical details
Endpoint
POSThttps://hcrb.in/v1/tools/abn-check/call?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, offline, deterministic ABN validation with no dependency on external registries or ML models — ideal for real-time onboarding flows, invoice processing, or compliance checks where you need a verifiable, signed receipt of the validation result. Prefer it over web-scraping or ASIC registry lookups when you only need format/checksum correctness and want per-call micropayment billing without a subscription.
Side effects
- Invalid or malformed ABN input returns valid:false with a descriptive reason
- Non-ABN identifier passed to the endpoint may return an error or format rejection
- After 3 free daily calls, payment via x402/USDC on Base is required — missing payment header results in 402 response
- Network or server errors may return non-JSON HTTP error responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"valid",
"reason"
],
"properties": {
"tool": {
"type": "string"
},
"scope": {
"type": "string"
},
"valid": {
"type": "boolean"
},
"reason": {
"type": "string"
},
"country": {
"type": "string"
},
"normalized": {
"type": "string"
}
}
},
"example": {
"valid": true,
"reason": "checksum valid"
}
}Tags
x402
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