US CPI inflation rate (YoY) API

Pull the BLS public CPI-U index series (headline + core) keyless and compute the latest year-over-year inflation rate, the month-over-month change, and a 12-month trend for both headline and core. The value-add is the YoY rate computation: BLS publishes an index level, we turn it into the percentage people quote. Differs from finance-inflation-adjust (which adjusts a dollar amount). Answers 'what is the current US inflation rate', 'latest CPI YoY', 'headline vs core inflation', 'is inflation rising or falling'.

Price$0.01per request

MethodPOST

Route/v1/finance/inflation-rate

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache3600s public

financeinflationcpiblsyoyeconomycorerate

API URLhttps://x402.hexl.dev/v1/finance/inflation-rate

Integration docs

Example request

{}

Example response

{
  "latestMonth": "2025-12",
  "headlineYoyPct": 3.2,
  "coreYoyPct": 3.4,
  "headlineMomPct": 0.2,
  "coreMomPct": 0.3,
  "trend": "cooling",
  "headlineTrend": [
    {
      "date": "2025-01",
      "index": 311.1,
      "yoyPct": 3.5
    }
  ]
}

Input schema

{
  "type": "object",
  "additionalProperties": false,
  "properties": {}
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}