Perp premium and predicted · Perp Basis

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://agent402.tools/api/perp-basis", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "coin": "BTC"
  }),
});
const data = await res.json();

curl -X POST \
  "https://agent402.tools/api/perp-basis" \
  -H "Content-Type: application/json" \
  -d '{"coin":"BTC"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "coin": "BTC",
  "fetchedAt": "2026-08-22T12:00:00.000Z",
  "funding": {
    "aprPct": 10.95,
    "hourly": 0.0000125,
    "per8h": 0.0001
  },
  "impactPremiumPct": 0.0388,
  "markOraclePremiumBps": 4.01,
  "markOraclePremiumPct": 0.0401,
  "markPx": 77267,
  "midPx": 77266.5,
  "oraclePx": 77236,
  "predictedFunding": [
    {
      "aprPct": 10.95,
      "fundingIntervalHours": 1,
      "fundingRate": 0.0000125,
      "nextFundingTime": "2026-08-22T13:00:00.000Z",
      "per8h": 0.0001,
      "venue": "HlPerp"
    }
  ],
  "source": "hyperliquid"
}