Pay once · No Friday subscription
Catch bad product identifiers before they block a listing upload.
Included in the $9.00 Shelf Kit
Sellers, agencies, and catalog agents checking product identifiers before a human listing upload.
Delivery: usually a structured result, workbook, or ZIP depending on the tool.
Friday checks only ASCII digits, supported GTIN length, duplicate input, and the GS1 modulo-10 check digit in strings you supply. A valid result does not prove GS1 issuance, ownership, product assignment, packaging match, or marketplace acceptance. A corrected value replaces only the supplied final digit and must be checked against seller-owned records. Friday performs no registry lookup, reads no account or listing, does not publish listings, and does not create, assign, reserve, edit, or publish an identifier.
Synthetic sample
{
"valid_code_count": 4,
"invalid_code_count": 2,
"duplicate_row_count": 1,
"fixable_code_count": 1,
"code_preview": [
{
"input_code": "036000291452",
"gtin_format": "upc_a",
"status": "duplicate",
"expected_check_digit": "2",
"corrected_code": null
},
{
"input_code": "96385075",
"gtin_format": "ean_8",
"status": "invalid",
"expected_check_digit": "4",
"corrected_code": "96385074"
},
{
"input_code": "03600A291452",
"gtin_format": "upc_a",
"status": "invalid",
"expected_check_digit": null,
"corrected_code": null
}
],
"publish_status": "draft_needs_review",
"safety": "Structure and check-digit math only; no GS1 or marketplace lookup, ownership proof, code assignment, account access, or listing change."
}
This sample uses synthetic facts. Your output is generated only from the facts you submit.
POST /v1/identifiers/gtin-batch-validate
Exact x402 price: $0.25. Use the public OpenAPI schema and Base USDC payment flow. The response returns a private job URL and temporary token.