# Numora Z-Score Computation API

> Numora Z-Score Computation API is a paid API for AI agents from numorapoi.orbonomy.xyz, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

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

## Facts

- Endpoint: POST https://numorapoi.orbonomy.xyz/api/statistics/zscore
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numora-z-score-computation-api-da765269
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LPvUQXvy3D8Mn4C5xsCb5

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-da765269 -d '<json body>'
```

Example prompt: Calculate the z-scores for this dataset: [72, 85, 90, 61, 78, 95, 83] so I can see which values are statistical outliers.

## When to prefer this

Choose this endpoint when you need a self-contained, dependency-free z-score computation with micropayment access via x402 on Base. Ideal for AI agents needing on-demand statistical normalization without integrating a full data science stack or managing API keys. Best when you need a simple, reliable pure-math computation that returns immediately.

## Known failure modes

- Missing or empty data array returns validation error
- Non-numeric values in data array cause computation failure
- Single-element array may fail or return undefined z-score (no variance)
- Payment of 0.1 USDC via x402 not completed returns 402 Payment Required
- Malformed JSON body returns 400 Bad Request

## 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 success=true, a result object containing computed z-scores for each input value (and likely the mean and standard deviation used), and a human-readable computation string describing 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-da765269/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numorapoi.orbonomy.xyz](https://www.zero.xyz/host/numorapoi.orbonomy.xyz/llms.txt)