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code402 B2B Invoice Lookup
x402
code402 B2B Invoice Lookup is a paid API for AI agents from hcrb.in, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).
Performs offline deterministic validation of a B2B invoice record, verifying its status, settlement details, and associated merchant/client data via a pay-per-call x402 USDC micropayment.
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
Returns a JSON object with a boolean 'valid' field, the invoice_id, a status string (e.g. settled/pending), merchant name, client name, settlement timestamp (Unix), amount in USDC, and the blockchain tx_hash. A 'scope' field indicates whether the check was checksum-verifiable or format-only. Signed receipts are non-custodial.
Example use cases
Verify supplier invoice before payment
“Before I pay this vendor, can you check invoice INV-2024-00192 to confirm it's valid, who issued it, and whether it's already been settled?”
Audit settled invoices for accounting
“Pull up the details for invoice B2B-9928 — I need the settlement timestamp, the USDC amount, and the transaction hash for our accounting records.”
Client dispute resolution check
“A client is disputing invoice INV-77341 — can you verify its current status, the client name on file, and whether it shows as settled on the blockchain?”
Technical details
Endpoint
POSThttps://hcrb.in/v1/tools/get-b2b-invoice/call?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, deterministic, offline lookup of a B2B invoice's validity and settlement status without relying on ML models or external scraping. Ideal for automated AP/AR workflows, audit trails requiring blockchain tx_hash receipts, or due-diligence pipelines that need cost-effective per-call pricing ($0.005 USDC). Prefer this over full ERP integrations when you only need lightweight invoice status checks with cryptographic receipt proof.
Side effects
- Invoice ID not found — returns valid:false with a descriptive reason
- Malformed invoice_id format — validation error returned
- Payment failure via x402 — call not executed if USDC payment is rejected
- Rate limit exceeded beyond 3 free calls/day without payment — 402 response
- Network or settlement delay causing stale data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"valid",
"invoice_id",
"status"
],
"properties": {
"tool": {
"type": "string"
},
"scope": {
"type": "string"
},
"valid": {
"type": "boolean"
},
"status": {
"type": "string"
},
"tx_hash": {
"type": "string"
},
"merchant": {
"type": "string"
},
"invoice_id": {
"type": "string"
},
"settled_at": {
"type": "number"
},
"amount_usdc": {
"type": "number"
},
"client_name": {
"type": "string"
}
}
},
"example": {
"valid": true,
"reason": "checksum valid"
}
}Tags
x402
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