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SignalDesk AI – Pearson Correlation
x402
SignalDesk AI – Pearson Correlation 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 Pearson correlation coefficient between two numeric arrays
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 Pearson r value (a float between -1 and 1), where 1 indicates perfect positive linear correlation, -1 perfect negative, and 0 no linear relationship.
Example use cases
Sales vs. advertising spend analysis
“I have monthly sales figures [12000, 15000, 13500, 17000, 19000] and the corresponding ad spend [1000, 1400, 1200, 1600, 2000] — can you calculate the Pearson correlation to see how tightly they move together?”
Climate vs. energy consumption study
“Here are average daily temperatures for the past week: [32, 35, 28, 40, 45, 38, 42], and the corresponding energy usage in kWh: [210, 225, 195, 260, 290, 240, 275]. What's the Pearson r between them?”
Student test score correlation
“I want to know if study hours correlate with exam scores — hours: [2, 4, 6, 8, 10, 12] and scores: [55, 65, 70, 80, 88, 95]. Can you run a Pearson correlation on those?”
Technical details
Endpoint
POSThttps://x402-agent.kariguetoazul.workers.dev/api/stats/correlation?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, paid, serverless Pearson r computation without running your own statistical library — particularly useful in agent pipelines where you want an auditable, bounded-cost statistic call on two numeric series of up to 1000 observations each.
Side effects
- Arrays of unequal length may cause an error or undefined behavior
- Arrays with fewer than 2 items will be rejected (minItems: 2)
- Arrays with values exceeding ±1e15 will be rejected by schema validation
- Zero-variance arrays (all identical values) may produce NaN or division-by-zero
- Payment failure (x402) will block execution if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| x | array | At least two observations. |
| y | array | At least two observations. |
Output
Schema · Response
{
"type": "json",
"example": {
"pearson_r": 1
}
}Tags
x402
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