Effective federal funds rate

Current effective federal funds rate plus a trailing N-day series. Source: FRED DFF (Board of Governors). ?days=30 (1-365, default 30).

Input

Field	Type	Description
days	number	Trailing days to return (1-365, default 30)

Example output

{
  "date": "2026-06-17",
  "current": 5.33,
  "days": 30,
  "history": [
    {
      "date": "2026-05-19",
      "value": 5.33
    }
  ],
  "source": "FRED DFF"
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/fed-funds?days=30"

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/fed-funds?days=30");

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

Part of these workflows

This tool is one step in a curated multi-tool workflow — agents can fetch the whole sequence as an MCP prompt or call https://agent402.tools/api/skill-packs/{slug}/prompt.

• Macro economics — Pull the canonical US macro dataset — yield curve, CPI, unemployment, fed funds, Sahm rule — without an API key.

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