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GTIN Barcode Check Digit Validator
x402
GTIN Barcode Check Digit Validator is a paid API for AI agents from id-validators.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Validates the check digit of a UPC-A, EAN-8, EAN-13, or GTIN-14 barcode and identifies its format.
Price / call$0.02
Success—
StatusUnknown
How this service works
Validate a UPC-A, EAN-8, EAN-13 or GTIN-14 barcode check digit and name its format.
Output
Returns a verdict (valid/invalid), the detected format (UPC-A, EAN-8, EAN-13, or GTIN-14), the normalized barcode string, its length, a human-readable summary, reasons for any failure, and metadata such as source and timestamp. A 'degraded' flag indicates partial service availability.
Example use cases
Retail product data entry validation
“Before we add this product to our catalog, can you verify that barcode 5901234123457 has a valid check digit and tell me what format it is?”
E-commerce listing integrity check
“We're importing a supplier feed and some barcodes look suspicious — can you validate whether 00012345678905 is a legitimate GTIN-14 barcode with a correct check digit?”
Point-of-sale error diagnosis
“A customer's item is failing to scan and the printed barcode reads 04006381333931 — can you check if the check digit is correct and identify the barcode format?”
Technical details
Endpoint
GEThttps://id-validators.x402tookit.com/gtin-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify the mathematical integrity of a retail or supply chain barcode (UPC-A, EAN-8, EAN-13, GTIN-14) before storing, displaying, or processing it. Prefer it over general-purpose regex checks because it applies the correct Luhn-style check digit algorithm per format and returns a structured verdict with the identified format name. For other identifier types (CUSIP, ISIN, ISBN, VIN, ISSN), use the sibling endpoints on the same platform.
Side effects
- Missing or empty 'id' query parameter returns an error
- Non-numeric or malformed input may return invalid verdict with reasons
- Barcode length not matching any known format returns null format
- Check digit mismatch returns invalid verdict with explanation
- Network timeout or service degradation sets degraded flag
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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