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Delx Commerce — Volatility Sample Calculator
x402
Delx Commerce — Volatility Sample Calculator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Computes sample volatility (standard deviation and annualized volatility) from a caller-supplied array of period returns
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object containing: the mean return, count of observations, annualized volatility, standard deviation, the schema identifier (delx/util-volatility-sample/v1), and an advisory note clarifying this is descriptive sample volatility only.
Example use cases
Portfolio risk assessment from daily returns
“I have these daily returns for my portfolio over the past week: [0.012, -0.005, 0.008, 0.021, -0.003]. Can you calculate the annualized volatility using 365 as the annualization factor?”
Options pricing volatility input
“I need to price some options and need the historical volatility input. Here are 30 daily log returns: [0.002, -0.008, 0.015, -0.001, 0.007, 0.003, -0.012, 0.009, 0.001, -0.004, 0.006, 0.011, -0.003, 0.002, -0.007, 0.008, 0.004, -0.005, 0.013, -0.002, 0.006, -0.009, 0.001, 0.005, -0.003, 0.007, 0.002, -0.006, 0.004, 0.008]. Annualize using 365 periods per year.”
Monthly return series volatility for fund reporting
“I have monthly returns for a fund: [0.03, -0.02, 0.04, 0.01, -0.015, 0.025]. What's the annualized volatility using 12 periods per year, and what's the standard deviation?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/volatility-sample?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-use volatility computation without any signup or subscription overhead, and when you need verifiable on-chain payment via USDC. Ideal for AI agents performing one-off financial analytics tasks, risk calculations, or volatility inputs for derivative pricing, especially when the agent controls a crypto wallet. Prefer over heavyweight financial data platforms when you already have the return series and just need the statistical computation.
Side effects
- Empty or missing returns array causes computation failure
- Non-numeric values in the returns array cause parsing errors
- Fewer than 2 data points may produce unreliable or undefined standard deviation
- Missing periods_per_year defaults may produce un-annualized results
- Payment failure via x402 (insufficient USDC balance) blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| returns | array | Caller-supplied period returns for sample volatility. |
| periods_per_year | number | Annualization factor (e.g. 365 for daily). |
Output
Schema · Response
{
"type": "json",
"example": {
"mean": 0.00125,
"count": 4,
"schema": "delx/util-volatility-sample/v1",
"advisory": "Descriptive sample volatility only.",
"annualized_vol": 0.25609752,
"standard_deviation": 0.01340476
}
}Tags
x402
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