# US CPI Year-Over-Year Inflation Rate (FRED)

> US CPI Year-Over-Year Inflation Rate (FRED) is a paid API for AI agents from agent402.tools, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns the latest US Consumer Price Index (CPI-U) year-over-year inflation rate plus trailing 12 months of YoY readings, sourced from FRED CPIAUCSL.

## Facts

- Endpoint: GET https://agent402.tools/api/cpi-yoy
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-cpi-year-over-year-inflation-rate-fred-7ae46401
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DOoD0LM82TMACDFyO_oYr

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability us-cpi-year-over-year-inflation-rate-fred-7ae46401
```

Example prompt: What's the current US headline inflation rate and how has it trended over the past 12 months? Pull the latest CPI year-over-year data from FRED.

## When to prefer this

Use this endpoint when you need the current US headline CPI-U year-over-year inflation rate and/or its recent 12-month trend, without needing to set up FRED API credentials yourself. Ideal for macroeconomic dashboards, financial analysis agents, or any workflow that needs a quick, reliable, no-parameter inflation lookup sourced directly from official government data.

## Known failure modes

- FRED data source temporarily unavailable — upstream service outage
- Stale data if FRED has not yet published the latest monthly release
- Payment failure (x402) — insufficient USDC balance or payment not accepted
- HTTP 402 if payment is not provided
- Rate limiting or access restriction on the agent402.tools proxy

## How this service works

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.

## Output

Returns the current US CPI-U year-over-year inflation rate (headline inflation) and a list of the trailing 12 monthly YoY readings, sourced from the FRED CPIAUCSL series with pc1 transformation. No parameters required.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-cpi-year-over-year-inflation-rate-fred-7ae46401/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)