Skill: Cross-asset price monitor

Bundled execution of the Cross-asset price monitor workflow - Side-by-side snapshot of a stock and a crypto asset: live quotes, 1-year history, and a date-stamped comparison. One x402 payment runs 5 underlying tools (stock-quote, stock-history, crypto-price, crypto-history, date-format); partial-success per step.

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Input

Example output

{
  "pack": "price-monitor",
  "args": {
    "ticker": "AAPL",
    "coin": "bitcoin"
  },
  "steps": [
    {
      "slug": "stock-quote",
      "ok": true,
      "result": {}
    },
    {
      "slug": "stock-history",
      "ok": true,
      "result": {}
    },
    {
      "slug": "crypto-price",
      "ok": true,
      "result": {}
    },
    {
      "slug": "crypto-history",
      "ok": true,
      "result": {}
    },
    {
      "slug": "date-format",
      "ok": true,
      "result": {}
    }
  ],
  "summary": "5/5 steps succeeded"
}

Try it - see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/skill/price-monitor \
  -H "Content-Type: application/json" \
  -d '{"ticker":"AAPL","coin":"bitcoin"}'

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/skill/price-monitor", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "ticker": "AAPL",
    "coin": "bitcoin"
  }),
});

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