{"uid":"cap_GWTX54THo5DTIuy2CWCyu","slug":"gs1-barcode-check-digit-calculator-and-verifier-82705fce","name":"GS1 Barcode Check Digit Calculator and Verifier","description":"Compute or verify the GS1 mod-10 check digit for EAN-8, UPC-A, EAN-13, ITF-14 (GTIN-14) and SSCC numbers.","url":"https://barcode-qr.x402tookit.com/barcode-check-digit?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["code"],"properties":{"code":{"type":"string","description":"Digits with or without the check digit, e.g. 4006381333931 or 400638133393"},"type":{"type":"string","description":"ean8, upca, ean13, itf14 or sscc (default: guessed from the length)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"name":{"type":["null","string"]},"type":{"type":["null","string"]},"action":{"type":["null","string"]},"source":{"type":["null","string"]},"payload":{"type":["null","string"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"checkDigit":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"fullNumber":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"givenCheckDigit":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4rKgrqQk4p3W_fDRhzK3E","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes or verifies the GS1 mod-10 check digit for EAN-8, UPC-A, EAN-13, ITF-14 (GTIN-14), and SSCC barcode numbers.","exampleAgentPrompt":"Can you verify whether the EAN-13 barcode 4006381333931 has the correct check digit, or compute what it should be?","exampleUseCases":[{"title":"Verify product barcode before printing","prompt":"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?"},{"title":"Compute missing UPC-A check digit","prompt":"I have a UPC-A product code without the last digit: 03600029145 — what's the correct check digit to complete it?"},{"title":"Validate SSCC shipping label","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T18:32:46.339Z","isFirstParty":false,"canonicalSlug":"gs1-barcode-check-digit-calculator-and-verifier-82705fce"}