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Agent402 UK GTIN Check Digit Validator
x402
Agent402 UK GTIN Check Digit Validator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates the GS1 check digit for GTIN-8, GTIN-12 (UPC), GTIN-13 (EAN), and GTIN-14 barcodes — checksum verification only, no product registry lookup.
Price / call$0.001
Success—
StatusUnknown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns a JSON object with: the GTIN kind (e.g. GTIN-13), its alias (e.g. EAN-13), a top-level valid boolean, the normalized 14-digit GTIN-14 representation, and a valid_checksum boolean confirming whether the GS1 check digit is mathematically correct.
Example use cases
Catalog ingest barcode gate
“Before I add these products to my catalog, can you verify that the barcode 0614141000036 has a valid GS1 check digit?”
E-commerce UPC validation
“I'm importing a product feed and one of the UPCs is 012345678905 — can you check if that's a valid UPC barcode?”
Warehouse scan error detection
“A scanner just read EAN-13 code 4006381333931 — can you confirm the check digit is correct before I book it into inventory?”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/validate/gtinWhen to prefer
Use this endpoint when you need a fast, cheap ($0.001) checksum-only gate before ingesting barcodes into a product catalog or database — it does not perform a product registry lookup, so it is ideal for bulk validation pipelines where you only need to confirm the GS1 check digit is mathematically correct for GTIN-8, UPC (GTIN-12), EAN (GTIN-13), or GTIN-14 codes.
Side effects
- Non-numeric input or wrong digit count returns invalid/error
- GTIN length outside 8, 12, 13, or 14 digits is rejected
- Check digit mismatch returns valid_checksum: false but still parses the kind
- Malformed JSON body or missing gtin field returns 4xx error
- Network or payment failure (402) if USDC payment not attached
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| gtin | string | GTIN-8/12/13/14, EAN, or UPC digits |
Output
Schema · Response
{
"type": "json",
"example": {
"kind": "GTIN-13",
"alias": "EAN-13",
"valid": true,
"gtin14": "05901234123457",
"valid_checksum": true
}
}Tags
x402
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