Energy Battery Energy Storage Bess

{
  "avgChargePrice": 164.88,
  "avgDischargePrice": 261.96,
  "baseload": 211.94,
  "chargeBeforeDischarge": false,
  "chargeHours": [
    {
      "hour": "02:00 - 03:00",
      "price": 168.32
    },
    {
      "hour": "23:00 - 00:00",
      "price": 161.43
    }
  ],
  "checkedAt": "2026-10-23T09:38:24.620Z",
  "currency": "EUR",
  "deliveryDay": "2026-10-21",
  "dischargeHours": [
    {
      "hour": "08:00 - 09:00",
      "price": 265.07
    },
    {
      "hour": "17:00 - 18:00",
      "price": 258.84
    }
  ],
  "durationHours": 2,
  "grossMarginPerMwDay": 131.29,
  "grossMarginPerMwhStored": 65.65,
  "market": "EPEX SPOT day-ahead DE-LU",
  "note": "Perfect-foresight, one cycle per day, before grid fees, imbalance and degradation. chargeBeforeDischarge=false means the cheapest hours come after the dearest ones on that day.",
  "roundTripEfficiency": 0.88,
  "source": "https://www.epexspot.com/en/market-results?market_area=DE-LU&auction=MRC&trading_date=2026-10-20&delivery_date=2026-10-21&modality=Auction&sub_modality=DayAhead&data_mode=table",
  "spread": 97.08
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.tradeenergy-api.workers.dev/api/energy/battery-energy-storage-bess?date=2026-10-21&durationHours=2'

# 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://api.tradeenergy-api.workers.dev/api/energy/battery-energy-storage-bess?date=2026-10-21&durationHours=2' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.tradeenergy-api.workers.dev%2Fapi%2Fenergy%2Fbattery-energy-storage-bess
const res = await pay("https://api.tradeenergy-api.workers.dev/api/energy/battery-energy-storage-bess?date=2026-10-21&durationHours=2");
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.tradeenergy-api.workers.dev/api/energy/battery-energy-storage-bess?date=2026-10-21&durationHours=2")
    print(res.status_code, res.text)