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finmath Future Value Calculator
x402
finmath Future Value Calculator is a paid API for AI agents from finmath.qzqh5rrbkz.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Computes the future value of a present amount given a periodic interest rate and number of compounding periods
Price / call$0.001
Success—
StatusUnknown
How this service works
Deterministic finance and crypto math for AI agents: TradFi (NPV, IRR, XIRR, Black-Scholes + Greeks, bonds, VaR, Sharpe) and DeFi (impermanent loss, perp liquidation, funding, Uniswap v3, health factor, cost basis). Exact, model-free arithmetic that LLMs get wrong — priced per call in USDC.
Output
Returns a result object containing the computed future value of the input amount after the specified number of periods at the given rate, along with a meta object containing call and computation metadata.
Example use cases
Example prompt
“What will $5,000 grow to after 10 periods at a rate of 0.6% per period — give me the exact future value using deterministic math?”
Technical details
Endpoint
POSThttps://finmath.qzqh5rrbkz.workers.dev/v1/future_valueWhen to prefer
Use this endpoint when you need exact, deterministic future value calculations that cannot be trusted to an LLM's arithmetic. Ideal for financial planning agents, investment projectors, or any workflow requiring reliable compound interest math with audit-quality precision. Prefer over LLM estimation whenever reproducibility and exactness matter.
Side effects
- Missing required field (amount, periods, or rate_per_period) returns a validation error
- Non-numeric values for numeric fields cause a 400-level error
- Payment not provided or insufficient USDC causes a 402 Payment Required response
- Negative periods or extreme rate values may produce unexpected mathematical results
- Network timeout if the Cloudflare Worker is unavailable
Input
{
"amount": 1000,
"periods": 5,
"rate_per_period": 0.05
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| amountrequired | number | amount |
| periodsrequired | number | periods |
| rate_per_periodrequired | number | rate_per_period |
Output
{
"meta": {
"tool": "future_value",
"disclaimer": "Deterministic calculation utility. Not financial, investment, or trading advice.",
"deterministic": true
},
"result": 1276.2815625000003
}Schema · Response
| Field | Type | Description |
|---|---|---|
| metarequired | object | |
| resultrequired | — |
Tags
x402
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