Solar Pv Yield

{
  "annual_energy_kwh": 6739.23,
  "annual_irradiation_kwh_m2": 1745.9,
  "location": {
    "elevation_m": 250,
    "lat": 45,
    "lon": 8
  },
  "monthly": [
    {
      "avg_daily_kwh": 12.77,
      "energy_kwh": 395.96,
      "irradiation_kwh_m2": 94.04,
      "month": 1
    },
    {
      "avg_daily_kwh": 15.59,
      "energy_kwh": 436.47,
      "irradiation_kwh_m2": 106.18,
      "month": 2
    },
    {
      "avg_daily_kwh": 19.88,
      "energy_kwh": 616.2,
      "irradiation_kwh_m2": 154.37,
      "month": 3
    },
    {
      "avg_daily_kwh": 21.09,
      "energy_kwh": 632.66,
      "irradiation_kwh_m2": 163.66,
      "month": 4
    },
    {
      "avg_daily_kwh": 22.1,
      "energy_kwh": 684.96,
      "irradiation_kwh_m2": 180.96,
      "month": 5
    },
    {
      "avg_daily_kwh": 23.59,
      "energy_kwh": 707.56,
      "irradiation_kwh_m2": 191.54,
      "month": 6
    },
    {
      "avg_daily_kwh": 24.93,
      "energy_kwh": 772.69,
      "irradiation_kwh_m2": 211.81,
      "month": 7
    },
    {
      "avg_daily_kwh": 23.39,
      "energy_kwh": 725.02,
      "irradiation_kwh_m2": 197.28,
      "month": 8
    },
    {
      "avg_daily_kwh": 20.72,
      "energy_kwh": 621.47,
      "irradiation_kwh_m2": 164.1,
      "month": 9
    },
    {
      "avg_daily_kwh": 15.05,
      "energy_kwh": 466.59,
      "irradiation_kwh_m2": 117.47,
      "month": 10
    },
    {
      "avg_daily_kwh": 10.91,
      "energy_kwh": 327.41,
      "irradiation_kwh_m2": 80.51,
      "month": 11
    },
    {
      "avg_daily_kwh": 11.36,
      "energy_kwh": 352.23,
      "irradiation_kwh_m2": 83.97,
      "month": 12
    }
  ],
  "note": "Modelled long-term average output for a grid-connected fixed-mount PV system. With no tilt given, the optimal tilt and azimuth are chosen.",
  "radiation_database": "PVGIS-SARAH2",
  "source": "PVGIS, European Commission Joint Research Centre",
  "specific_yield_kwh_per_kwp": 1347.8,
  "system": {
    "angles_optimised": true,
    "azimuth_deg": 2,
    "mounting": "free-standing",
    "peak_power_kwp": 5,
    "system_loss_pct": 14,
    "technology": "c-Si",
    "tilt_deg": 38
  },
  "year_to_year_sd_kwh": 318.83,
  "years": "2005-2020"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/solar/pv-yield?kwp=5&lat=45&lon=8'

# 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/pv-yield?kwp=5&lat=45&lon=8' \
  | 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%2Fpv-yield
const res = await pay("https://saylorinnovations.com/api/solar/pv-yield?kwp=5&lat=45&lon=8");
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/pv-yield?kwp=5&lat=45&lon=8")
    print(res.status_code, res.text)