x402-catalog-history.ai-business-surface.workers.dev

Barcode check digit validator in one GET: EAN-13, UPC-A, EAN-8, ISBN-10 and ISBN-13 — returns the symbology, the check digit it carries, the expected check digit and whether the number is valid. curl: GET /barcode?code=9780306406157 (spaces and hyphens are ignored). Response: {"normalized":"9780306406157","symbology":"isbn-13","length":13,"check_digit":"7","expected_check_digit":"7","valid":true,"

Open endpoint ↗

Price per call: $0.001
Chain: Base
Method: GET
Paid calls · 30 days: 0

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://x402-catalog-history.ai-business-surface.workers.dev/barcode", { method: "GET" });
console.log(await res.json());

https://x402-catalog-history.ai-business-surface.workers.dev/barcode