Weather

{
  "alert_count": 0,
  "alerts": [],
  "alerts_supported": true,
  "attribution": "Weather data from the National Weather Service (api.weather.gov), a U.S. government servic…",
  "caveats": [
    "forecast periods are NWS's standard day/night 12-hour periods (up to 7 days = 14 periods),…"
  ],
  "current": {
    "condition": "Mostly Cloudy",
    "temperature": 68
  },
  "forecast": [
    {
      "name": "Today",
      "short_forecast": "Sunny",
      "temperature": 72,
      "temperature_unit": "F"
    }
  ],
  "location": {
    "city": "Washington",
    "latitude": 38.8894,
    "longitude": -77.0352,
    "state": "DC"
  },
  "provider": "nws"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://draconic21-x402-api.onrender.com/v1/weather' \
  -H 'content-type: application/json' \
  --data-raw '{"forecast_days":3,"lat":38.8894,"lon":-77.0352}'

# 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 - -X POST 'https://draconic21-x402-api.onrender.com/v1/weather' \
  -H 'content-type: application/json' \
  --data-raw '{"forecast_days":3,"lat":38.8894,"lon":-77.0352}' \
  | 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 $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
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 $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdraconic21-x402-api.onrender.com%2Fv1%2Fweather&method=POST
const res = await pay("https://draconic21-x402-api.onrender.com/v1/weather", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "forecast_days": 3,
    "lat": 38.8894,
    "lon": -77.0352
  }),
});
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 $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://draconic21-x402-api.onrender.com/v1/weather",
        json={
            "forecast_days": 3,
            "lat": 38.8894,
            "lon": -77.0352,
        },
    )
    print(res.status_code, res.text)