Significant

{
  "count": 1,
  "events": [
    {
      "alert_level": "red",
      "depth_km": 10,
      "event_type": "earthquake",
      "felt_reports": 90,
      "id": "us6000tgb9",
      "latitude": 32.6817,
      "longitude": 130.7217,
      "magnitude": 6.8,
      "magnitude_type": "mww",
      "occurred_at": "2026-07-28T07:27:15.512Z",
      "official_url": "https://earthquake.usgs.gov/earthquakes/eventpage/us6000tgb9",
      "place": "The 2026 Kumamoto Region, Japan Earthquake",
      "significance": 723,
      "source_network": "us",
      "status": "reviewed",
      "tsunami": false,
      "updated_at": "2026-08-04T04:45:03.869Z"
    }
  ],
  "operation": "significant-earthquakes",
  "query": {
    "days": 30,
    "limit": 50,
    "min_significance": 600,
    "window_end": "2026-08-04T00:00:00Z",
    "window_start": "2026-07-05T00:00:00Z"
  },
  "retrieved_at": "2026-08-04T20:17:20Z",
  "schema_version": "usgs-earthquake-v1",
  "source": {
    "generated_at": "2026-08-04T20:17:14Z",
    "name": "USGS"
  },
  "stale": false,
  "warnings": [
    "USGS earthquake data can be revised and is not an emergency-warning service."
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://earthquakes.use.x402atlas.com/significant?days=30&limit=50&min_significance=600'

# 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://earthquakes.use.x402atlas.com/significant?days=30&limit=50&min_significance=600' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fearthquakes.use.x402atlas.com%2Fsignificant
const res = await pay("https://earthquakes.use.x402atlas.com/significant?days=30&limit=50&min_significance=600");
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://earthquakes.use.x402atlas.com/significant?days=30&limit=50&min_significance=600")
    print(res.status_code, res.text)