GTIN/UPC/EAN validate API

Validates the GS1 mod-10 check digit for UPC-A, EAN-13, EAN-8, or GTIN-14, auto-detecting the format and emitting the zero-padded canonical GTIN-14. Answers 'Is this barcode number valid?', 'What is the GTIN-14 form?'.

Price$0.04per request

MethodPOST

Route/v1/validate/gtin

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

gtinupceanbarcodecheck-digitmod-10validategs1retail

API URLhttps://x402.hexl.dev/v1/validate/gtin

Integration docs

Example request

{
  "code": "036000291452"
}

Example response

{
  "valid": true,
  "reason": "Valid UPC-A/GTIN-12 (mod-10 OK).",
  "normalized": "036000291452",
  "detectedFormat": "UPC-A/GTIN-12",
  "checkDigit": {
    "expected": "2",
    "actual": "2"
  },
  "gtin14": "00036000291452"
}

Input schema

{
  "type": "object",
  "required": [
    "code"
  ],
  "properties": {
    "code": {
      "type": "string",
      "description": "8, 12, 13, or 14 digit product code.",
      "examples": [
        "036000291452"
      ]
    },
    "format": {
      "type": "string",
      "description": "Optional explicit format: ean-8, upc-a, ean-13, gtin-14, etc.",
      "examples": [
        "upc-a"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}