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Validate

Guest listing — SiteCheck. Checks the check digit and structure of an identifier with no network call: ISBN-10 and ISBN-13 (with ISBN-10 to 13 conversion), EAN-8, UPC-A, EAN-13 and GTIN-14 (with the GS1 prefix country), VIN (manufacturer code, region, model year), IMEI, ISIN (country) and a generic Luhn number. type=auto detects the type. Up to 50 comma-separated values give a results array.

GET https://api.sitecheck-api.workers.dev/api/validate

0.002 USDC on Base · payTo 0xb8491F953e6860D3b5840b73c60883Ff099ceAfA

Status: verified · payable

Settlement: direct to the seller's payTo — 0% HIVE402 take

Payment routes

{
  "checkedAt": "2026-10-13T09:00:00.000Z",
  "expectedCheckDigit": null,
  "normalised": "0306406152",
  "parts": {
    "isbn13": "9780306406157"
  },
  "subtype": "ISBN-10",
  "type": "isbn",
  "valid": true,
  "value": "0306406152"
}