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Delx Commerce — Pairs Z-Score Calculator
x402
Delx Commerce — Pairs Z-Score Calculator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Computes the z-score, mean, and standard deviation of a spread series for statistical pairs trading analysis
Price / call$0.001
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 of the spread series, the standard deviation (stdev), the current z-score of the spread, and a schema identifier string ('delx/util-pairs-zscore/v1') for versioned result validation.
Example use cases
Mean reversion entry signal detection
“I'm running a pairs trade on AAPL vs MSFT and I have their 60-day spread series — can you compute the z-score so I know if the current deviation is statistically significant enough to enter a position?”
Crypto pairs trading bot decision
“My trading bot tracks the ETH/BTC spread. Here's the last 50 daily spread values: [0.2, 0.4, -0.1, 0.6, 0.9, ...]. Compute the z-score so I can trigger a mean reversion trade when it's beyond 2 standard deviations.”
Spread normalization for backtesting
“I'm backtesting a statistical arbitrage strategy and need to normalize this spread series to z-scores so I can compare signals across different asset pairs — can you compute the mean, stdev, and z-score for this array of spread values?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/pairs-zscore?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call statistical computation of z-scores for pairs trading or spread analysis without managing your own math infrastructure. It is ideal for AI agents running quantitative strategies that need on-demand, verifiable statistical results billed in USDC with no signup or subscription required.
Side effects
- Empty or missing 'spread' array results in a validation error
- Non-numeric values in the spread array cause computation failure
- A spread array with fewer than 2 elements cannot produce a meaningful standard deviation
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Malformed JSON body returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| spread | array | Spread series for pairs z-score |
Output
Schema · Response
{
"type": "json",
"example": {
"mean": 1,
"stdev": 0.1290994448735805,
"schema": "delx/util-pairs-zscore/v1",
"zscore": 0
}
}Tags
x402
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