Solar Irradiance

{
  "annual": {
    "air_temp_c": 10.39,
    "solar_kwh_m2_day": 2.9398,
    "wind_10m_m_s": 5.01
  },
  "best_month": {
    "air_temp_c": 15.48,
    "month": 6,
    "solar_kwh_m2_day": 5.2968,
    "wind_10m_m_s": 4.41
  },
  "location": {
    "elevation_m": 73.15,
    "lat": 51.5,
    "lon": -0.12
  },
  "monthly": [
    {
      "air_temp_c": 4.14,
      "month": 1,
      "solar_kwh_m2_day": 0.8366,
      "wind_10m_m_s": 5.78
    },
    {
      "air_temp_c": 4.27,
      "month": 2,
      "solar_kwh_m2_day": 1.5079,
      "wind_10m_m_s": 5.74
    },
    {
      "air_temp_c": 6.09,
      "month": 3,
      "solar_kwh_m2_day": 2.6426,
      "wind_10m_m_s": 5.41
    },
    {
      "air_temp_c": 9.02,
      "month": 4,
      "solar_kwh_m2_day": 4.0387,
      "wind_10m_m_s": 4.65
    },
    {
      "air_temp_c": 12.27,
      "month": 5,
      "solar_kwh_m2_day": 4.8749,
      "wind_10m_m_s": 4.74
    },
    {
      "air_temp_c": 15.48,
      "month": 6,
      "solar_kwh_m2_day": 5.2968,
      "wind_10m_m_s": 4.41
    },
    {
      "air_temp_c": 17.63,
      "month": 7,
      "solar_kwh_m2_day": 5.0887,
      "wind_10m_m_s": 4.43
    },
    {
      "air_temp_c": 17.31,
      "month": 8,
      "solar_kwh_m2_day": 4.1856,
      "wind_10m_m_s": 4.49
    },
    {
      "air_temp_c": 14.65,
      "month": 9,
      "solar_kwh_m2_day": 3.2347,
      "wind_10m_m_s": 4.65
    },
    {
      "air_temp_c": 11.29,
      "month": 10,
      "solar_kwh_m2_day": 1.8506,
      "wind_10m_m_s": 5.19
    },
    {
      "air_temp_c": 7.33,
      "month": 11,
      "solar_kwh_m2_day": 0.9874,
      "wind_10m_m_s": 5.2
    },
    {
      "air_temp_c": 4.79,
      "month": 12,
      "solar_kwh_m2_day": 0.6619,
      "wind_10m_m_s": 5.49
    }
  ],
  "period": "25-year climatology",
  "source": "NASA POWER (Prediction Of Worldwide Energy Resources)",
  "units": "solar in kWh per square metre per day (equals peak sun hours); temperature in C; wind in m/s at 10 m",
  "worst_month": {
    "air_temp_c": 4.79,
    "month": 12,
    "solar_kwh_m2_day": 0.6619,
    "wind_10m_m_s": 5.49
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/solar/irradiance?lat=51.5&lon=-0.12'

# 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://saylorinnovations.com/api/solar/irradiance?lat=51.5&lon=-0.12' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fsolar%2Firradiance
const res = await pay("https://saylorinnovations.com/api/solar/irradiance?lat=51.5&lon=-0.12");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/solar/irradiance?lat=51.5&lon=-0.12")
    print(res.status_code, res.text)