Weather forecast (US)

Multi-period weather forecast for a US location from api.weather.gov (NWS, public domain). Give latitude and longitude; returns the place plus upcoming forecast periods (temp, wind, conditions). US coverage only. ?lat=40.71&lon=-74.01

Input

Field	Type	Description
lat *	number	latitude (US)
lon *	number	longitude (US)

Example output

{
  "location": {
    "city": "New York",
    "state": "NY"
  },
  "lat": 40.71,
  "lon": -74.01,
  "periods": [
    {
      "name": "Today",
      "temperature": 72,
      "unit": "F",
      "wind": "10 mph",
      "shortForecast": "Sunny"
    }
  ]
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/weather-forecast?lat=40.71&lon=-74.01"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/weather-forecast?lat=40.71&lon=-74.01");

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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