After-Hours Oracle

How agents pay

Hit any endpoint without payment and you get an HTTP 402 whose challenge offers two ways to pay: USDC on Base (easiest — where most x402 agents already hold funds) or USDG on Robinhood Chain. Sign either with your wallet and retry; the payment settles on-chain and the data comes back. The x402 client libraries do the whole dance in one wrapper:

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from '@x402/fetch';
import { ExactEvmScheme } from '@x402/evm/exact/client';
import { privateKeyToAccount } from 'viem/accounts';

const account = privateKeyToAccount(process.env.PK); // USDC on Base is enough
const client = new x402Client()
  .register('eip155:8453', new ExactEvmScheme(account))  // pay in USDC on Base
  .register('eip155:4663', new ExactEvmScheme(account)); // or USDG on Robinhood Chain
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch('https://HOST/price/NVDA'); // pays $0.05, settles on-chain
console.log(await res.json());

# or see the challenge yourself:
$ curl -i https://HOST/price/NVDA
HTTP/1.1 402 Payment Required
payment-required: eyJ4NDAyVmVyc2lvbiI6Mi4uLi  (base64 payment requirements)

The buyer needs no ETH on either chain; settlement gas is sponsored by this service's self-hosted x402 facilitator, which settles both eip155:8453 (Base) and eip155:4663 (Robinhood Chain). Response shape: ticker, live on-chain price, last NYSE close, discount percent, and whether the NYSE is open right now.

Every price route also speaks MPP (the Stripe/Tempo Machine Payments Protocol): the same 402 carries an MPP challenge alongside the x402 one, and an MPP client can pay in PathUSD on Tempo. One endpoint, two agent-payment standards.

Read this before trading on it

• These pools are thin. Robinhood Chain is days old and its stock-token pools hold modest liquidity. The price is the real on-chain print, but it is not the price you could execute at size, and small trades move it.
• It is a spot read, not a TWAP. The signal reads the pool's current slot0 price. A motivated actor could push a thin pool to paint a temporary discount. Do not let an agent trade this naively; confirm dips persist across reads before acting.
• A discount is not free money. The stock/ETH pools charge a 5% fee tier, so much of a small "dip" disappears into fees and slippage on any actual buy.
• Signal-only tickers (marked on the board) have a readable price pool but no liquid on-chain route to buy them via the Universal Router. You can buy their signal; you cannot currently buy the stock on this chain.