Energy Compute Window

{
  "best": {
    "avg_gco2_per_kwh": 61.5,
    "co2_kg": 246,
    "end": "2026-07-13T15:30:00.000Z",
    "hours_from_now": 14.5,
    "start": "2026-07-13T11:30:00.000Z"
  },
  "data_source": "NESO Carbon Intensity API (carbonintensity.org.uk)",
  "goal": "carbon",
  "job": {
    "duration_hours": 4,
    "energy_mwh": 4,
    "load_mw": 1
  },
  "now": {
    "avg_gco2_per_kwh": 138.2,
    "co2_kg": 552.8,
    "hours_from_now": 0,
    "start": "2026-07-12T21:00:00.000Z"
  },
  "recommendation": "Start at 2026-07-13T11:30:00.000Z (in 14.5h). Shifting a 4h / 1 MW job from now to that window saves 306.8 kg CO2 — 55.5% — versus running immediately.",
  "region": "UK",
  "region_name": "Great Britain (national)",
  "savings": {
    "vs_now": {
      "co2_kg": 306.8,
      "co2_pct": 55.5
    },
    "vs_worst": {
      "co2_kg": 402,
      "co2_pct": 62
    }
  },
  "verdict": "shift"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://gridpulse.theaslangroupllc.com/api/energy/compute-window'

# 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://gridpulse.theaslangroupllc.com/api/energy/compute-window' \
  | 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 $0.25 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.25" });
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 $0.25 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgridpulse.theaslangroupllc.com%2Fapi%2Fenergy%2Fcompute-window
const res = await pay("https://gridpulse.theaslangroupllc.com/api/energy/compute-window");
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 $0.25 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.25"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://gridpulse.theaslangroupllc.com/api/energy/compute-window")
    print(res.status_code, res.text)