Brief

{
  "as_of": 1790496611,
  "attribution": "Supported by National Energy SO Open Data",
  "context": {
    "price": {
      "max": 246.58,
      "median": 146.23,
      "min": -23.28,
      "percentile": 43,
      "sample_count": 1424,
      "unit": "GBP/MWh",
      "vs_median_pct": -2.9,
      "window_days_actual": 29.6
    }
  },
  "context_window_requested_days": 30,
  "coverage_note": "Context blocks are omitted for metrics this zone doesn't publish or where fewer than 20 samples exist. window_days_actual reflects the real data span, which varies by zone and metric. \"current\" is the most recent point at or before reque...",
  "current": {
    "demand": {
      "ts": 1790494200,
      "unit": "MW",
      "value": 20878
    },
    "price": {
      "ts": 1790467200,
      "unit": "GBP/MWh",
      "value": 141.97
    }
  },
  "license": "NESO-Open-Licence",
  "summary": "For Great Britain, price is typical (43rd percentile over the last 29.6 days); carbon intensity is typical (34th percentile); demand is typical; wind is the largest generation source at 54.3% of the mix.",
  "zone": "GB",
  "zone_name": "Great Britain"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.grid-hub.app/v1/brief/:zone'

# 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.grid-hub.app/v1/brief/:zone' \
  | 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%2Fapi.grid-hub.app%2Fv1%2Fbrief%2F%3Azone
const res = await pay("https://api.grid-hub.app/v1/brief/:zone");
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://api.grid-hub.app/v1/brief/:zone")
    print(res.status_code, res.text)