Inflation adjustment (CPI real value) API

Adjust a dollar amount between two years using the BLS CPI-U index (keyless public API), returning the real (inflation-adjusted) amount, the two index values used, the cumulative inflation %, and the annualized rate. The value-add is picking the right index periods and deriving the metrics, not a raw index dump. Answers 'what is $100 in 1990 worth today', 'inflation between 2000 and 2020', 'adjust this amount for inflation', 'cumulative inflation since 1980'.

Price$0.01per request

MethodPOST

Route/v1/finance/inflation-adjust

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache3600s public

financeinflationcpireal-valueblspurchasing-powerdeflatoreconomics

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

Integration docs

Example request

{
  "amount": 100,
  "fromYear": 1990,
  "toYear": 2024
}

Example response

{
  "amount": 100,
  "fromYear": 1990,
  "toYear": 2024,
  "fromCpi": 133.8,
  "toCpi": 315.605,
  "adjustedAmount": 235.88,
  "cumulativeInflationPercent": 135.88,
  "annualizedRatePercent": 2.556,
  "series": "CUUR0000SA0"
}

Input schema

{
  "type": "object",
  "required": [
    "amount",
    "fromYear"
  ],
  "properties": {
    "amount": {
      "type": "number",
      "examples": [
        100
      ]
    },
    "fromYear": {
      "type": "number",
      "examples": [
        1990
      ]
    },
    "toYear": {
      "type": "number",
      "examples": [
        2024
      ]
    }
  }
}

Output schema

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