Uv Index

{
  "advice": "wear sunscreen and sunglasses; seek shade at midday",
  "band_now": "low",
  "forecast": [
    {
      "clear_sky_max": 5.9,
      "date": "2026-10-12",
      "sunrise": "2026-10-12T06:55",
      "sunset": "2026-10-12T18:22",
      "uv_index_max": 4.05
    },
    {
      "clear_sky_max": 5.95,
      "date": "2026-10-13",
      "sunrise": "2026-10-13T06:56",
      "sunset": "2026-10-13T18:21",
      "uv_index_max": 5.95
    },
    {
      "clear_sky_max": 5.95,
      "date": "2026-10-14",
      "sunrise": "2026-10-14T06:57",
      "sunset": "2026-10-14T18:19",
      "uv_index_max": 5.95
    },
    {
      "clear_sky_max": 5.9,
      "date": "2026-10-15",
      "sunrise": "2026-10-15T06:58",
      "sunset": "2026-10-15T18:18",
      "uv_index_max": 5.9
    },
    {
      "clear_sky_max": 5.85,
      "date": "2026-10-16",
      "sunrise": "2026-10-16T06:59",
      "sunset": "2026-10-16T18:17",
      "uv_index_max": 5.85
    }
  ],
  "location": {
    "lat": 34.05,
    "lon": -118.24,
    "timezone": "America/Los_Angeles"
  },
  "observed_at": "2026-10-12T14:00",
  "source": "Open-Meteo",
  "today_band": "moderate",
  "today_max": 4.05,
  "uv_index_now": 2.9
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/uv/index?lat=34.05&lon=-118.24'

# 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/uv/index?lat=34.05&lon=-118.24' \
  | 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%2Fuv%2Findex
const res = await pay("https://saylorinnovations.com/api/uv/index?lat=34.05&lon=-118.24");
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/uv/index?lat=34.05&lon=-118.24")
    print(res.status_code, res.text)