# Numora Z-Score Computation API

> Numora Z-Score Computation API is a paid API for AI agents from numomo.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Computes the z-score (standard score) for a dataset, indicating how many standard deviations each value is from the mean

## Facts

- Endpoint: POST https://numomo.vercel.app/api/statistics/zscore
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numora-z-score-computation-api-0cfe5836
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SlYcliyjGe8RzogbhZdwg

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability numora-z-score-computation-api-0cfe5836 -d '<json body>'
```

Example prompt: Calculate the z-scores for this dataset: [72, 85, 90, 65, 78, 88, 95, 60, 70, 83] — I want to see which values are statistical outliers.

## When to prefer this

Choose this endpoint when you need pure server-side z-score computation without any external data dependencies — ideal for AI agents that need deterministic, reproducible statistical normalization at low cost ($0.10 USDC). Prefer this over general-purpose code execution environments when you want a reliable, single-purpose math microservice with no setup overhead.

## Known failure modes

- Empty data array returns validation error
- Non-numeric values in array cause computation failure
- Single-element array may cause division-by-zero for standard deviation
- Malformed request body returns 400 error
- Payment not processed results in 402 response
- Very large arrays may cause timeout

## How this service works

100 pure math computation endpoints for AI agents. Statistics, financial math, linear algebra, equation solving, calculus, number theory, sequence generation, and unit conversions. Zero external dependencies. x402 micropayments on Base.

## Output

Returns a JSON object with a success flag, a result object containing the computed z-scores (and likely mean and standard deviation of the input array), and a human-readable computation description string explaining what was calculated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "data"
 ],
 "properties": {
  "data": {
   "type": "array"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "success",
  "result",
  "computation"
 ],
 "properties": {
  "result": {
   "type": "object",
   "description": "Computation result varies by endpoint"
  },
  "success": {
   "type": "boolean",
   "description": "Always true on success"
  },
  "computation": {
   "type": "string",
   "description": "Human-readable description of what was computed"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numora-z-score-computation-api-0cfe5836/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numomo.vercel.app](https://www.zero.xyz/host/numomo.vercel.app/llms.txt)