US CPI year-over-year inflation

Latest US Consumer Price Index year-over-year inflation rate (headline CPI-U) plus the trailing 12 months of YoY readings - the headline inflation number. Source: FRED CPIAUCSL with pc1 transformation. No params.

Input

No parameters.

Example output

{
  "date": "2026-05-01",
  "inflationYoYPct": 3.4,
  "trailing12mo": [
    {
      "date": "2025-06-01",
      "value": 3
    }
  ],
  "source": "FRED CPIAUCSL (BLS)"
}

Try it - see the 402 challenge (free)

curl -i "https://agent402.tools/api/cpi-yoy"

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/cpi-yoy");

Part of these workflows

This tool is one step in 5 curated multi-tool workflows - agents can fetch the whole sequence as an MCP prompt or call https://agent402.tools/api/skill-packs/{slug}/prompt.

• Fixed-income desk - Read the rate environment and price a bond in one workflow: the live Treasury curve, the recession-signal spread, inflation context, then price and yield a specific coupon bond at current rates.
• Macro economics - Pull the canonical US macro dataset - yield curve, CPI, unemployment, fed funds, Sahm rule - without an API key.
• Macro dashboard refresh - The full macro + crypto dashboard in one call: 5 FRED series, 5 Treasury reads, yield-curve spread, crypto market/trending/global, and live gas - the 14-tool basket recurring buyers refresh every cycle, bundled below its a la carte price.
• Macro backdrop snapshot - The 'is the economic backdrop you're modeling against still current?' pack. Pull the canonical macro signals - CPI year-over-year, unemployment, fed funds, the Treasury yield curve, a G10 FX dashboard, the Sahm Rule recession indicator, and the next scheduled economic releases - in one composed workflow. Seven egress tools, one composite snapshot the agent can cite before doing any forecast or investment math.
• Inflation check - Is the economy in recession territory? CPI, fed funds, unemployment, and Sahm rule in one call.

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