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Lite Sortino Ratio Calculator
x402
Lite Sortino Ratio Calculator is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Computes a Sortino-like ratio using downside standard deviation of negative returns, returning the ratio and sample count as deterministic JSON.
Price / call$0.001
Success—
StatusUnknown
How this service works
Lite Sortino using downside stdev of negative returns. Call when penalizing downside volatility without a full analytics stack. Returns sortino-like ratio and n as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Output
Returns a deterministic JSON object containing a Sortino-like ratio (computed from the downside standard deviation of negative returns in the input series) and n (the count of observations used in the calculation). No external data sources are consulted; the result is purely a local mathematical computation.
Example use cases
Portfolio downside risk screening
“I have these monthly portfolio returns: [0.03, -0.02, 0.04, -0.05, 0.01, -0.01, 0.02, -0.03] — can you compute the Sortino ratio so I can see how it penalizes the losing months?”
Strategy comparison on downside risk
“Compare these two return streams for me by computing a Sortino ratio for each — strategy A: [0.01, -0.005, 0.02, -0.03, 0.015] and strategy B: [0.005, -0.02, 0.03, -0.01, 0.01] — I only care about downside volatility.”
Algo trading drawdown evaluation
“My algo produced these daily returns last month: [0.002, -0.003, 0.001, -0.008, 0.004, -0.001, 0.003, -0.005, 0.002, -0.004] — run a Sortino calculation so I can see if the downside deviation is killing my risk-adjusted performance.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/sortino-liteWhen to prefer
Choose this endpoint when you need a quick, cheap, deterministic Sortino-like ratio from a return series without deploying a full analytics library or stack. It is ideal for lightweight agents, serverless pipelines, or environments where installing scipy/pandas is impractical. Prefer it over full Sharpe ratio endpoints when downside-only penalty is specifically desired. Not suitable when you need a Sharpe ratio, full analytics report, or live market data integration.
Side effects
- Empty or missing returns array — likely returns an error or undefined ratio
- Insufficient negative returns to compute downside standard deviation (e.g., all positive returns) — n may be zero, ratio undefined or null
- Non-numeric values in the returns array — may return an error or NaN
- Payment failure via x402 — request not processed if USDC payment is not confirmed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| returns | array | Input field: returns. |
Output
Schema · Response
{
"type": "json",
"example": {
"n": 4,
"mean": 0.00875,
"schema": "delx/util-sortino-lite/v1",
"sortino": 0,
"downside_stdev": 0
}
}Tags
x402
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