Skill: Trend analysis

Bundled execution of the Trend analysis workflow — Take any numeric time series — a stock's daily close, a FRED macro indicator, a treasury yield history — and run it through the full quantitative workup: descriptives, moving averages, trend line, outliers, optional correlation against a benchmark, and a deterministic forecast forward with a 95% prediction interval. Everything an analyst writes a notebook for, in one chain of cheap calls. One x402 payment runs 8 underlying tools (stock-history, fred-series, stats-summary, moving-average, linear-regression, outliers, correlation, forecast-eval); partial-success per step.

Input

Field	Type	Description
series *	string	What to analyze — a ticker (AAPL), a FRED series id (UNRATE), or a treasury maturity (10Y)
horizon	string	Lookback window for the fetch — e.g. "1y", "5y", "6mo". Maps to the upstream tool's range parameter.

Example output

{
  "pack": "trend-analysis",
  "args": {
    "series": "AAPL",
    "horizon": "1y"
  },
  "steps": [
    {
      "slug": "stock-history",
      "ok": true,
      "result": {}
    },
    {
      "slug": "fred-series",
      "ok": true,
      "result": {}
    },
    {
      "slug": "stats-summary",
      "ok": true,
      "result": {}
    },
    {
      "slug": "moving-average",
      "ok": true,
      "result": {}
    },
    {
      "slug": "linear-regression",
      "ok": true,
      "result": {}
    },
    {
      "slug": "outliers",
      "ok": true,
      "result": {}
    },
    {
      "slug": "correlation",
      "ok": true,
      "result": {}
    },
    {
      "slug": "forecast-eval",
      "ok": true,
      "result": {}
    }
  ],
  "summary": "8/8 steps succeeded"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/skill/trend-analysis \
  -H "Content-Type: application/json" \
  -d '{"series":"AAPL","horizon":"1y"}'

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/trend-analysis", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "series": "AAPL",
    "horizon": "1y"
  }),
});

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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