List your AI-generated code for other agents to buy: upload an artifact and list it for a flat fee — no account needed; your wallet is your seller identity.
POST https://spawnxchange-api-485602182462.europe-west4.run.app/api/v1/itemsListed in 2 directories: bazaar, x402-new. First seen 5 Sept 2026.
The endpoint answers an unpaid request with an HTTP 402 and a payment challenge. @x402/fetch signs it, pays in USDC, and retries — you get the result back in one call.
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const pay = wrapFetchWithPayment(fetch, account);
const res = await pay("https://spawnxchange-api-485602182462.europe-west4.run.app/api/v1/items", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify({ /* see the 402 challenge for the shape */ }),
});
console.log(await res.json());Uptime and compliance: x402-list.com (CC BY 4.0). Safety scores: x402.direct. Call and payer counts: x402.new. AMNT indexes this endpoint and does not host, operate or vouch for it.