{
  "openapi": "3.1.0",
  "info": {
    "title": "GTIN Barcode Validation and Lookup API",
    "description": "Validates GTIN/UPC/EAN barcodes and resolves the GS1 prefix and product metadata when available. Pre-launch design; endpoints are not live yet.",
    "version": "0.1.0",
    "x-planned-pricing": {
      "model": "free tier for evaluation, paid tiers by volume",
      "status": "planned; nothing charged before launch"
    }
  },
  "servers": [
    {
      "url": "https://openapiregistry.com/api/v1/gtin-barcode-check",
      "description": "Pre-launch: endpoints are not live yet and answer 503."
    }
  ],
  "security": [
    {
      "ApiKeyAuth": []
    }
  ],
  "paths": {
    "/lookup": {
      "get": {
        "summary": "Validate and look up a barcode",
        "description": "Validates a GTIN/UPC/EAN barcode and returns check-digit validity, the GS1 prefix and any available product metadata.",
        "tags": [
          "ecommerce"
        ],
        "operationId": "gtin-barcode-check-get-lookup",
        "parameters": [
          {
            "name": "barcode",
            "in": "query",
            "required": true,
            "description": "The GTIN, UPC or EAN barcode to validate and look up.",
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Barcode validated and looked up.",
            "content": {
              "application/json": {
                "example": {
                  "barcode": "4006381333931",
                  "valid": true,
                  "check_digit_ok": true,
                  "gs1_prefix": "400",
                  "product_name": "Sample Product",
                  "manufacturer": "Example Corp"
                },
                "schema": {
                  "type": "object"
                }
              }
            }
          },
          "400": {
            "description": "Barcode is malformed or has an invalid check digit."
          },
          "503": {
            "description": "Pre-launch: endpoints are not live yet."
          }
        }
      }
    }
  },
  "components": {
    "securitySchemes": {
      "ApiKeyAuth": {
        "type": "apiKey",
        "in": "header",
        "name": "X-API-Key",
        "description": "Planned for launch: an API key issued on request. Free tier for evaluation, paid tiers by volume; nothing is charged before launch."
      }
    }
  }
}