# Investing Math – Inflation Adjustment Calculator

> Investing Math – Inflation Adjustment Calculator is a paid API for AI agents from invest-math.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).

Calculates the inflation-adjusted future cost of an amount and the real return after inflation for a given nominal return rate.

## Facts

- Endpoint: GET https://invest-math.x402tookit.com/inflation-adjust?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/investing-math-inflation-adjustment-calculator-c87a6666
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_smPzgKzR4C1u00qX2J6Uh

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 investing-math-inflation-adjustment-calculator-c87a6666
```

Example prompt: What will $25,000 cost in 15 years if inflation averages 3.5% per year, and what's the real return if I earn a nominal 7% annually?

## When to prefer this

Use this endpoint when you need fast, deterministic inflation math — specifically the future cost of a present-day amount, purchasing power erosion over time, or the real return after inflation for a nominal rate. Prefer it over general LLM estimates when you need precise numerical outputs like cumulative inflation percent, price multiples, or halving years for financial planning, retirement, or budgeting workflows.

## Known failure modes

- Missing required query parameters (amount, inflationPct, years) returns a validation error
- Years outside 0–100 range may be rejected or produce extreme results
- inflationPct outside -10 to 100 range may be rejected
- Non-numeric parameter values cause parsing errors
- Payment failure (x402) prevents the call from completing

## How this service works

What an amount costs or is worth after years of steady inflation, plus the real return after inflation for a nominal return.

## Output

Returns the future cost of the input amount after the specified years of inflation, the remaining purchasing power of that amount, cumulative inflation percentage, the price multiple, how many years until purchasing power halves, real growth of the amount, and optionally the real return percentage if a nominal return is provided. Also includes a summary, disclaimer, and data source metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "amount",
      "inflationPct",
      "years"
     ],
     "properties": {
      "years": {
       "type": "number",
       "description": "Years, 0 to 100"
      },
      "amount": {
       "type": "number",
       "description": "Amount in today's money"
      },
      "inflationPct": {
       "type": "number",
       "description": "Yearly inflation in percent, -10 to 100"
      },
      "nominalReturnPct": {
       "type": "number",
       "description": "A nominal yearly return in percent, to get the real return"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "halvingYears": {
       "type": [
        "null",
        "number"
       ]
      },
      "priceMultiple": {
       "type": [
        "null",
        "number"
       ]
      },
      "realReturnPct": {
       "type": [
        "null",
        "number"
       ]
      },
      "futureCostOfToday": {
       "type": [
        "null",
        "number"
       ]
      },
      "realGrowthOfAmount": {
       "type": [
        "null",
        "number"
       ]
      },

… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/investing-math-inflation-adjustment-calculator-c87a6666/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from invest-math.x402tookit.com](https://www.zero.xyz/host/invest-math.x402tookit.com/llms.txt)