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GS1 Barcode Check Digit Calculator and Verifier
x402
GS1 Barcode Check Digit Calculator and Verifier is a paid API for AI agents from barcode-qr.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).
Computes or verifies the GS1 mod-10 check digit for EAN-8, UPC-A, EAN-13, ITF-14 (GTIN-14), and SSCC barcode numbers.
Price / call$0.02
Success—
StatusUnknown
How this service works
Compute or verify the GS1 mod-10 check digit for EAN-8, UPC-A, EAN-13, ITF-14 (GTIN-14) and SSCC numbers.
Output
Returns the computed check digit, the full barcode number including the check digit, the detected or specified barcode type, a verdict on whether a supplied check digit is correct, and the given check digit if one was provided. Also includes a summary and any reasons for failure.
Example use cases
Verify product barcode before printing
“I'm about to print labels with the EAN-13 barcode 5901234123457 — can you check if the check digit is correct before I run the print job?”
Compute missing UPC-A check digit
“I have a UPC-A product code without the last digit: 03600029145 — what's the correct check digit to complete it?”
Validate SSCC shipping label
“We're generating shipping labels and need to confirm our SSCC number 376130321109100001 has the right GS1 mod-10 check digit — can you verify it?”
Technical details
Endpoint
GEThttps://barcode-qr.x402tookit.com/barcode-check-digit?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically compute or validate GS1 mod-10 check digits for retail and logistics barcodes (EAN-8, UPC-A, EAN-13, ITF-14/GTIN-14, SSCC) without implementing the algorithm yourself. Prefer this over manual calculation or general-purpose math endpoints when GS1 standard compliance and type-specific validation are required.
Side effects
- Invalid or non-numeric characters in the code
- Code length doesn't match the specified barcode type
- Unrecognized barcode type string
- Ambiguous length when type is not specified and auto-detection fails
- Network or payment authorization failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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