Water River Forecast

{
  "cells_compared": 9,
  "current_discharge_m3s": 51.48,
  "daily": [
    {
      "date": "2026-10-12",
      "discharge_m3s": 51.48,
      "seasonal_max_m3s": 51.48,
      "seasonal_mean_m3s": 51.48
    },
    {
      "date": "2026-10-13",
      "discharge_m3s": 47.42,
      "seasonal_max_m3s": 47.64,
      "seasonal_mean_m3s": 47.47
    },
    {
      "date": "2026-10-14",
      "discharge_m3s": 44.29,
      "seasonal_max_m3s": 46.42,
      "seasonal_mean_m3s": 44.43
    },
    {
      "date": "2026-10-15",
      "discharge_m3s": 41.36,
      "seasonal_max_m3s": 44.19,
      "seasonal_mean_m3s": 41.65
    },
    {
      "date": "2026-10-16",
      "discharge_m3s": 38.99,
      "seasonal_max_m3s": 41.56,
      "seasonal_mean_m3s": 39.16
    },
    {
      "date": "2026-10-17",
      "discharge_m3s": 36.93,
      "seasonal_max_m3s": 42.25,
      "seasonal_mean_m3s": 37.72
    },
    {
      "date": "2026-10-18",
      "discharge_m3s": 35.64,
      "seasonal_max_m3s": 56.94,
      "seasonal_mean_m3s": 38.5
    },
    {
      "date": "2026-10-19",
      "discharge_m3s": 35.14,
      "seasonal_max_m3s": 81.22,
      "seasonal_mean_m3s": 40.74
    },
    {
      "date": "2026-10-20",
      "discharge_m3s": 35.56,
      "seasonal_max_m3s": 91.68,
      "seasonal_mean_m3s": 41.11
    },
    {
      "date": "2026-10-21",
      "discharge_m3s": 35.39,
      "seasonal_max_m3s": 82.18,
      "seasonal_mean_m3s": 39.72
    }
  ],
  "flood_signal": "within normal range",
  "location": {
    "grid_lat": 48.775,
    "grid_lon": 2.3750153,
    "lat": 48.85,
    "lon": 2.35
  },
  "note": "Modelled discharge on a ~5 km grid (GloFAS); the largest-flow cell within about 5 km of the point, not a gauge reading",
  "peak_date": "2026-10-12",
  "peak_discharge_m3s": 51.48,
  "peak_vs_seasonal_mean_x": 1,
  "source": "Open-Meteo flood API (GloFAS)",
  "trend": "falling"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/water/river-forecast?lat=48.85&lon=2.35'

# 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/water/river-forecast?lat=48.85&lon=2.35' \
  | 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%2Fwater%2Friver-forecast
const res = await pay("https://saylorinnovations.com/api/water/river-forecast?lat=48.85&lon=2.35");
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/water/river-forecast?lat=48.85&lon=2.35")
    print(res.status_code, res.text)