Estimate

{
  "cost": {
    "federal_tax_credit_usd": 0,
    "gross_cost_usd": 28348
  },
  "electricity": {
    "rate_cents_per_kwh": 16.45,
    "utility": "Arizona Public Service Co"
  },
  "financials": {
    "first_year_savings_usd": 2145,
    "savings_25yr_usd": 50522,
    "simple_payback_years": 13.6
  },
  "location": {
    "county": "Maricopa County",
    "county_fips": "04013",
    "input": "200 W Washington St, Phoenix, AZ 85003",
    "lat": 33.4483,
    "lon": -112.0764,
    "matched_address": "200 W WASHINGTON ST, PHOENIX, AZ, 85003",
    "state": "AZ"
  },
  "production": {
    "annual_kwh": 13038,
    "specific_yield_kwh_per_kw": 1716
  },
  "system": {
    "orientation": "equator-facing (south)",
    "panel_watts": 400,
    "panels_approx": 19,
    "size_kw_dc": 7.6,
    "sized_to": "about 100% of annual usage (5-50 panels)",
    "tilt_deg": 20,
    "usage_offset_pct": 105
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://solarpulse.waltsoft.net/v1/estimate?address=200+W+Washington+St%2C+Phoenix%2C+AZ+85003'

# 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://solarpulse.waltsoft.net/v1/estimate?address=200+W+Washington+St%2C+Phoenix%2C+AZ+85003' \
  | 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsolarpulse.waltsoft.net%2Fv1%2Festimate
const res = await pay("https://solarpulse.waltsoft.net/v1/estimate?address=200+W+Washington+St%2C+Phoenix%2C+AZ+85003");
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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://solarpulse.waltsoft.net/v1/estimate?address=200+W+Washington+St%2C+Phoenix%2C+AZ+85003")
    print(res.status_code, res.text)