Recent earthquakes (USGS)

Real-time USGS earthquake feed: magnitude, place, time, depth, coordinates. Send GET /api/earthquakes with no required fields (2 optional) and pay $0.002 per call over x402 or MPP (there is no free tier). It returns a JSON object with count and quakes.

Live government data, no key. ?minMag=4.5&period=day (minMag: significant|4.5|2.5|1.0|all; period: hour|day|week|month).

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Parameters

Example request

curl -i "https://agent402.tools/api/earthquakes?minMag=4.5&period=day"

Without payment this returns HTTP 402 Payment Required with the exact price for earthquakes; any x402 v2 or MPP client pays it and retries.

Example response

{
  "count": 6,
  "quakes": [
    {
      "mag": 5.2,
      "place": "120 km SSE of Hihifo, Tonga",
      "time": "2026-06-12T03:14:00.000Z",
      "depthKm": 10,
      "lon": -173.9,
      "lat": -16.9,
      "url": "https://earthquake.usgs.gov/…"
    }
  ]
}

From an MCP client

catalog.call {
  "slug": "earthquakes",
  "params": {
    "minMag": "4.5",
    "period": "day"
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for earthquakes; the stdio package pays it from a wallet or from an AGENT402_CREDITS_KEY issued earlier. Local install: npx -y agent402-mcp.

Errors and behavior

• Every field is optional. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is canceled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• Cached: an identical request within 5m is answered from cache with X-Cache: hit.
• A POST with a JSON body to /api/earthquakes is served as this GET, with the body as the input.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

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();
client.setSpendControls?.({ maxAmountPerPayment: "$0.002" }); // refuse any quote above this tool's price
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/earthquakes?minMag=4.5&period=day");

Part of these workflows

Recent earthquakes (USGS) is one step in this skill pack, each sold as a single call:

• Location intel - Point at an address (or even a rough place name) and assemble the situational brief: precise coordinates, the canonical postal address, what's within walking distance, the live weather forecast, active NWS hazard alerts, and recent seismic activity. The deterministic 'what should I know about this place right now?' workup.

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