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finmath Funding APR Calculator
x402
finmath Funding APR 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).
Converts a perpetual futures funding rate into an annualized percentage rate (APR), accounting for funding interval frequency
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 computed annualized funding APR value derived from the raw funding rate and funding interval frequency, along with metadata about the calculation.
Example use cases
Example prompt
“What's the annualized APR for a perp with a funding rate of 0.01% paid 3 times a day?”
Technical details
Endpoint
POSThttps://finmath.qzqh5rrbkz.workers.dev/v1/funding_aprWhen to prefer
Use this endpoint when you need exact, deterministic arithmetic to annualize a crypto perpetual futures funding rate — especially when LLM-native math would be unreliable. Ideal when you know the per-interval funding rate and how many times per day it is charged and need a precise APR figure for yield comparisons, carry trade analysis, or cost-of-capital calculations.
Side effects
- Missing required funding_rate field returns validation error
- Invalid non-numeric values for funding_rate or intervals_per_day cause rejection
- intervals_per_day of zero may cause division error or undefined result
- Payment failure or insufficient USDC balance returns 402 payment required
Input
{
"funding_rate": 0.0001,
"intervals_per_day": 8
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| funding_raterequired | number | funding_rate |
| intervals_per_day | number | intervals_per_day |
Output
{
"meta": {
"tool": "funding_apr",
"disclaimer": "Deterministic calculation utility. Not financial, investment, or trading advice.",
"deterministic": true
},
"result": {
"apr": 0.29200000000000004,
"daily_rate": 0.0008,
"apy_compounded": 0.3389467028980555
}
}Schema · Response
| Field | Type | Description |
|---|---|---|
| metarequired | object | |
| resultrequired | — |
Tags
x402
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