Forecast (Holt-Winters seasonal) · Forecast Holt Winters

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/forecast-holt-winters", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "horizon": 4,
    "period": 4,
    "values": [
      10,
      14,
      18,
      22,
      11,
      15,
      19,
      23,
      12,
      16,
      20,
      24
    ]
  }),
});
const data = await res.json();

curl -X POST \
  "https://agent402.tools/api/forecast-holt-winters" \
  -H "Content-Type: application/json" \
  -d '{"horizon":4,"period":4,"values":[10,14,18,22,11,15,19,23,12,16,20,24]}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "alpha": 0.5,
  "beta": 0.1,
  "forecast": [
    {
      "lower95": 11.6958,
      "point": 12.5324,
      "step": 1,
      "upper95": 13.369
    },
    {
      "lower95": 15.5421,
      "point": 16.7253,
      "step": 2,
      "upper95": 17.9084
    },
    {
      "lower95": 19.4972,
      "point": 20.9462,
      "step": 3,
      "upper95": 22.3952
    },
    {
      "lower95": 23.5098,
      "point": 25.1831,
      "step": 4,
      "upper95": 26.8563
    }
  ],
  "gamma": 0.1,
  "horizon": 4,
  "method": "holt-winters",
  "n": 12,
  "period": 4,
  "periodSource": "provided",
  "seasonality": "additive"
}