FRED catalog search

Full-text search across FRED's ~800,000 economic time series. Returns series IDs (use with /api/fred-series), titles, frequency, units, and a popularity score. ?q=unemployment+rate&limit=10

Input

Field	Type	Description
q *	string	Search text
limit	number	Results to return, 1-100 (default 10)

Example output

{
  "query": "consumer price index",
  "count": 5,
  "results": [
    {
      "id": "CPIAUCSL",
      "title": "Consumer Price Index for All Urban Consumers: All Items",
      "frequency": "Monthly",
      "units": "Index 1982-1984=100",
      "popularity": 95
    }
  ]
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/fred-search?q=consumer+price+index&limit=5"

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/fred-search?q=consumer+price+index&limit=5");

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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