Alerts Flood

{
  "data": {
    "active": [
      {
        "event": "Flash Flood Warning",
        "expires": "2026-07-18T16:02:00-07:00",
        "headline": "Flash Flood Warning issued July 18 at 3:52PM MST until July 18 at 4:00PM MST by NWS Tucson AZ",
        "onset": "2026-07-18T15:52:00-07:00",
        "severity": "Severe",
        "source": "NWS"
      },
      {
        "event": "Flash Flood Warning",
        "expires": "2026-07-18T17:15:00-07:00",
        "headline": "Flash Flood Warning issued July 18 at 3:46PM MST until July 18 at 5:15PM MST by NWS Flagstaff AZ",
        "onset": "2026-07-18T15:46:00-07:00",
        "severity": "Severe",
        "source": "NWS"
      }
    ],
    "model_risk": [
      {
        "hazard": "heavy_rain",
        "probability": 0.677,
        "window_end": "2026-07-20T12:00:00.000Z",
        "window_start": "2026-07-18T12:00:00.000Z"
      }
    ]
  },
  "meta": {
    "data_mode": "live",
    "docs": "https://x402-factory.com/docs/weather.alerts.flood",
    "endpoint": "/v1/alerts/flood",
    "freshness": "realtime",
    "generated_at": "2026-10-05T10:15:58.024Z",
    "request_id": "req_00000000",
    "sources": [
      "NWS",
      "stub-model"
    ],
    "version": "1.0.0"
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://x402-factory.com/v1/alerts/flood?lat=33.4484&lon=-112.074'

# 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://x402-factory.com/v1/alerts/flood?lat=33.4484&lon=-112.074' \
  | 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%2Fx402-factory.com%2Fv1%2Falerts%2Fflood
const res = await pay("https://x402-factory.com/v1/alerts/flood?lat=33.4484&lon=-112.074");
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://x402-factory.com/v1/alerts/flood?lat=33.4484&lon=-112.074")
    print(res.status_code, res.text)