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finmath APR to APY Converter
x402
finmath APR to APY Converter is a paid API for AI agents from finmath.qzqh5rrbkz.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Converts an Annual Percentage Rate (APR) to Annual Percentage Yield (APY) given a compounding frequency, using exact arithmetic.
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 JSON object with a 'result' field containing the computed APY as a number, and a 'meta' field with additional call metadata.
Example use cases
Example prompt
“What's the APY on a savings account advertising 5.2% APR compounded monthly — give me the exact figure?”
Technical details
Endpoint
POSThttps://finmath.qzqh5rrbkz.workers.dev/v1/apr_to_apyWhen to prefer
Use this endpoint when you need a mathematically exact APR-to-APY conversion rather than relying on LLM approximation. Prefer it for financial applications, DeFi yield comparisons, lending rate disclosures, or any scenario where rounding errors are unacceptable. Ideal when the compounding frequency is known and a deterministic, auditable result is required.
Side effects
- Missing required fields (apr or compounds_per_year) returns a validation error
- Non-numeric values for apr or compounds_per_year return a type error
- compounds_per_year of 0 may cause division-by-zero or invalid result
- Payment failure (402) if USDC balance is insufficient
- Network timeout if Cloudflare Worker is unavailable
Input
{
"apr": 5,
"compounds_per_year": 12
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| aprrequired | number | apr |
| compounds_per_yearrequired | number | compounds_per_year |
Output
{
"meta": {
"tool": "apr_to_apy",
"disclaimer": "Deterministic calculation utility. Not financial, investment, or trading advice.",
"deterministic": true
},
"result": 64.34496113081846
}Schema · Response
| Field | Type | Description |
|---|---|---|
| metarequired | object | |
| resultrequired | — |
Tags
x402
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