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SignalDesk AI Standard Deviation Calculator
x402
SignalDesk AI Standard Deviation Calculator is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).
Computes the standard deviation of a provided array of numeric observations
Price / call$0.001
Success—
StatusUnknown
How this service works
Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.
Output
A JSON object containing a single field 'standard_deviation' with the computed standard deviation as a floating-point number (e.g. {"standard_deviation": 0.816496580927726})
Example use cases
Financial returns volatility measurement
“I have a list of daily stock returns for the past month: 0.02, -0.01, 0.03, 0.005, -0.02, 0.015, 0.01, -0.005, 0.025, -0.03, 0.04, 0.012, -0.008, 0.022, 0.018, -0.015, 0.007, 0.033, -0.011, 0.009 — can you tell me the standard deviation so I can understand the volatility?”
Quality control batch inspection
“I've recorded the weights of 10 manufactured parts in grams: 100.1, 99.8, 100.3, 100.0, 99.9, 100.2, 99.7, 100.4, 100.1, 99.6 — what's the standard deviation so I can check if production is consistent?”
Student test score dispersion
“Here are the exam scores from my class of 15 students: 72, 85, 90, 68, 77, 88, 95, 62, 79, 83, 91, 74, 87, 66, 80 — compute the standard deviation so I know how spread out the results are.”
Technical details
Endpoint
POSThttps://x402-agent.kariguetoazul.workers.dev/api/stats/standard-deviation?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, inexpensive, server-side standard deviation calculation on up to 1000 numeric values without implementing the math yourself. Ideal for AI agents needing statistical dispersion on the fly during analysis pipelines. At $0.001 USDC per call via x402, it is cost-effective for per-request use. Prefer this over rolling your own computation when correctness, auditability, and simplicity matter.
Side effects
- Empty array provided — minItems:1 requires at least one value
- Array exceeds 1000 items — maxItems:1000 limit enforced
- Non-numeric values in array cause validation failure
- Values outside ±1,000,000,000,000,000 range rejected
- Payment not included or insufficient — x402 payment required at $0.001 USDC per call
- Network timeout from Cloudflare Workers execution limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| values | array | Up to 1000 finite observations. |
Output
Schema · Response
{
"type": "json",
"example": {
"standard_deviation": 0.816496580927726
}
}Tags
x402
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