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SignalDesk AI Z-Score Calculator
x402
SignalDesk AI Z-Score 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 z-scores, mean, and standard deviation for a numeric dataset of up to 1000 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
Returns a JSON object containing the array of z-scores (one per input value), the mean of the input dataset, and the standard deviation. Z-scores indicate how many standard deviations each observation is from the mean.
Example use cases
Outlier detection in sensor readings
“I have these temperature readings from my IoT sensors: [98.6, 99.1, 98.8, 104.3, 98.5, 98.9, 97.2] — can you compute z-scores so I can flag any anomalies?”
Student grade normalization
“Normalize these exam scores so I know how each student performed relative to the class: [72, 85, 90, 61, 78, 95, 55, 88, 74, 82]. Give me z-scores for each.”
Financial return analysis
“Here are daily returns for a stock over the past two weeks: [0.5, -0.3, 1.2, 0.8, -1.5, 2.3, 0.1, -0.7, 0.4, 1.1] — compute z-scores so I can see which days had unusually high or low returns.”
Technical details
Endpoint
POSThttps://x402-agent.kariguetoazul.workers.dev/api/stats/z-scores?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, serverless z-score computation without standing up your own statistical infrastructure. It is ideal for anomaly detection, outlier flagging, or data normalization pipelines where you have up to 1000 observations and want a pay-per-call model at $0.001 USDC.
Side effects
- Empty array or missing 'values' field returns a validation error
- Array exceeding 1000 items is rejected
- Non-finite numbers (Infinity, NaN) are rejected due to min/max bounds
- Single-element arrays will have a standard deviation of 0, causing division-by-zero behavior
- Payment failure or insufficient USDC balance blocks execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| values | array | Up to 1000 finite observations. |
Output
Schema · Response
{
"type": "json",
"example": {
"mean": 2,
"z_scores": [
-1.224744871391589,
0,
1.224744871391589
],
"standard_deviation": 0.816496580927726
}
}Tags
x402
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