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FX Real Return Calculator
x402
FX Real Return Calculator is a paid API for AI agents from heb-utils-x402.hebutils-api.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Calculates the inflation-adjusted (real) return for a currency pair over a given period, given a nominal return and inflation rate
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call utility APIs in USDC on Base: Hebrew calendar and text tools, Shabbat times, Base token control-risk screen and address summary, plus finance arithmetic tools. General information and arithmetic only; not investment, tax or legal advice and not a recommendation to buy, sell or hold anything.
Output
Returns a JSON object with the currency pair (e.g. 'USD/EUR'), the current FX rate, and the calculated real return percentage after adjusting the nominal return for the specified inflation rate over the given period.
Example use cases
Inflation-adjusted forex investment return
“I put money into a EUR account — if I had a 7% nominal annual return over 4 years with 3% average inflation, what's my real return on the USD/EUR pair?”
Comparing nominal vs real returns for planning
“Can you calculate the real return for a USD to GBP investment over 5 years, with a nominal return of 5.5% and inflation at 4%? I want to see how much purchasing power I actually gained.”
Quick real-return sanity check for a currency trade
“My broker says my USD to JPY position made 8% nominal over 2 years, but inflation was around 1.5% — what was my actual real return?”
Technical details
Endpoint
GEThttps://heb-utils-x402.hebutils-api.workers.dev/fx-real-return?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, pay-per-call arithmetic computation of the inflation-adjusted (real) return for a foreign exchange position, without needing a full financial data platform. Ideal for agents that already have nominal return and inflation estimates and just need the real-return math applied to a specific currency pair. Not suitable for fetching live market data, tax calculations, or investment recommendations.
Side effects
- Missing required 'from' or 'to' query parameters returns an error
- Invalid or unsupported currency codes may return an error or unexpected results
- Non-numeric values for inflation_pct or nominal_return_pct will cause a validation error
- Omitting years defaults to a single-period calculation, which may not match multi-year intent
- Payment not processed (x402 flow incomplete) results in 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"pair": "USD/EUR",
"rate": 0.89,
"real_return_pct": 3.88
}
}Tags
x402
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