x402-isin-check

Is this ISIN well formed? One GET applies the ISO 6166 check digit and returns valid, the supplied and expected check digit, the checksum total, the country code and name, and the 9-character NSIN. Malformed input is 400 before payment; a wrong check digit is 200 with valid=false. The algorithm is bundled in this Worker; no registry is queried, nothing is stored and the query is not logged. A purc

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/isin", { method: "GET" });
console.log(await res.json());

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