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APR ↔ APY Converter with Deposit Projection
x402
APR ↔ APY Converter with Deposit Projection is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-15).
Converts APR to APY or APY to APR for any compounding frequency, and optionally projects the final value and gain of a deposit over N days.
Price / call$0.003
Success—
StatusUnknown
How this service works
Convert APR to APY or APY to APR for any compounding frequency (continuous, daily, hourly, per block...) and optionally project the final value and gain of a deposit over N days. Useful to compare DeFi yields.
Output
Returns the converted rate (both apr_pct and apy_pct), the compounding frequency label, and optionally the number of days, deposited capital, projected final_value, and gain in the same currency units as the input capital.
Example use cases
Compare DeFi yield pool returns
“I'm looking at two DeFi pools — one quotes 15% APR compounded hourly (8760 times a year) and another quotes 14.8% APY. Convert the APR to APY so I can see which one actually pays more.”
Project staking earnings over 90 days
“If I stake $5000 at 20% APY with daily compounding, how much will I have after 90 days and what's my total gain?”
Convert continuous compounding yield
“A protocol advertises 8% APR with continuous compounding — what's the equivalent APY? Use 0 for compounding periods per year to indicate continuous.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/apr-apy?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to compare DeFi, staking, or lending yields quoted in different formats (APR vs APY) or at different compounding frequencies. It is the right choice when you want a fast, single-call computation that also projects deposit growth over time, avoiding the need to implement compounding math manually.
Side effects
- Missing required rate_pct field returns validation error
- Invalid 'from' enum value (not 'apr' or 'apy') causes rejection
- Negative or zero rate_pct may produce unexpected results
- market_caps_by_year value of 0 is treated as continuous compounding — non-zero values indicate discrete periods
- Extremely large compounding periods per year may hit floating-point precision limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| days | integer | Days to project (default 365) |
| from | string | What the rate is |
| capital | number | Deposit to project (optional) |
| rate_pct | number | Rate in % |
| market_caps_by_year | integer | Compounding periods per year (0 = continuous, 365 = daily) |
Output
Schema · Response
{
"type": "json",
"example": {
"days": 365,
"gain": 105.155782,
"apr_pct": 10,
"apy_pct": 10.515578,
"capital": 1000,
"frequency": "diaria",
"final_value": 1105.155782,
"market_caps_by_year": 365
}
}Tags
x402
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