Jet Lag Shift

{
  "asOf": "2026-10-12T01:41:13.091Z",
  "daysToShift": 6,
  "degraded": false,
  "direction": "east",
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "fullyShiftedOn": "2026-11-06",
  "hoursDifference": 6,
  "notChecked": [
    "light exposure, melatonin or any medicine (not medical advice)",
    "flight times, layovers and the destination date line",
    "…1 more"
  ],
  "reasons": [
    "Eastward trips need earlier bedtimes and wake times each day.",
    "Day 1 is the start date and already includes the first step."
  ],
  "schedule": [
    {
      "bedtime": "10:00 PM",
      "date": "2026-11-01",
      "day": 1,
      "shiftedHours": 1,
      "wakeTime": "6:00 AM",
      "weekday": "Sunday"
    },
    {
      "bedtime": "9:00 PM",
      "date": "2026-11-02",
      "day": 2,
      "shiftedHours": 2,
      "wakeTime": "5:00 AM",
      "weekday": "Monday"
    }
  ],
  "shiftPerDayHours": 1,
  "source": "computed locally (shift per day is an input; about 1 hour a day is a common rule of thumb)",
  "summary": "Going east 6 h at 1 h a day: 6 day(s), fully shifted on 2026-11-06: bed 5:00 PM, up 1:00 AM.",
  "usualBedtime": "11:00 PM",
  "usualWakeTime": "7:00 AM",
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://focus-sleep-calc.x402tookit.com/jet-lag-shift?bedtime=11%3A00+PM&direction=east&hoursDifference=6&shiftPerDayHours=1&startDate=2026-11-01&wakeTime=7%3A00+AM'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://focus-sleep-calc.x402tookit.com/jet-lag-shift?bedtime=11%3A00+PM&direction=east&hoursDifference=6&shiftPerDayHours=1&startDate=2026-11-01&wakeTime=7%3A00+AM' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

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

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffocus-sleep-calc.x402tookit.com%2Fjet-lag-shift
const res = await pay("https://focus-sleep-calc.x402tookit.com/jet-lag-shift?bedtime=11%3A00+PM&direction=east&hoursDifference=6&shiftPerDayHours=1&startDate=2026-11-01&wakeTime=7%3A00+AM");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://focus-sleep-calc.x402tookit.com/jet-lag-shift?bedtime=11%3A00+PM&direction=east&hoursDifference=6&shiftPerDayHours=1&startDate=2026-11-01&wakeTime=7%3A00+AM")
    print(res.status_code, res.text)