{"id":"commerce.gtin-validate","version":"1.0.0","category":"commerce","description":"Validate GTIN-8, UPC/GTIN-12, EAN/GTIN-13 and GTIN-14 check digits; no product lookup.","priceMicroUsdc":0,"priceRevision":"2026-10-06-free-validation","pricingStatus":"free-validation","inputSchema":{"type":"object","properties":{"code":{"type":"string","maxLength":32}},"required":["code"],"additionalProperties":false},"outputSchema":{"type":"object","properties":{"valid":{"type":"boolean"},"format":{"type":"string"},"expectedCheckDigit":{"type":["string","null"]},"scope":{"type":"string"}},"required":["valid","format","expectedCheckDigit","scope"],"additionalProperties":false},"example":{"code":"036000291452"},"limits":{"inputBytes":131072,"outputBytes":65536,"networkTimeoutMs":0},"network":false,"sensitive":false,"route":"/v1/tools/commerce.gtin-validate","priceMicroUsd":0,"exampleUrl":"https://agent-utilities.agent-utilities.workers.dev/v1/content/examples/commerce.gtin-validate","page":"https://agent-utilities.agent-utilities.workers.dev/tools/commerce.gtin-validate","execution":{"method":"POST","url":"https://agent-utilities.agent-utilities.workers.dev/v1/tools/commerce.gtin-validate","requiredHeaders":{"Content-Type":"application/json"},"authentication":"none","paymentRequired":false,"chargedMicroUsd":"0","scope":"All available hosted tools are free during validation. Existing input, output and source-access limits apply. Full tools and the combined report share capacity limits that count attempts, including failed executions and marked checks; they are not per-user allowances. No account, API key, wallet or funding is needed. Existing credit balances are preserved. Live Reddit remains unavailable until configured. Paid billing will not resume automatically."}}