# Numora Z-Score Computation

> Numora Z-Score Computation is a paid API for AI agents from numnumora.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-16).

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

## Facts

- Endpoint: POST https://numnumora.vercel.app/api/statistics/zscore
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numora-z-score-computation-174753e6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zWv6eQjRM7tPNcvbWIXjW

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-174753e6 -d '<json body>'
```

Example prompt: Calculate the z-scores for this dataset: [12, 15, 14, 10, 18, 22, 9, 17] — I want to know how many standard deviations each value is from the mean.

## When to prefer this

Use this endpoint when you need pure server-side z-score computation without installing statistical libraries locally, especially in serverless or lightweight agent environments. Ideal for agents needing fast, dependency-free statistical normalization with micropayment billing.

## Known failure modes

- Missing 'data' field returns validation error
- Empty array or single-element array may produce division-by-zero for standard deviation
- Non-numeric values in the array cause computation failure
- Malformed JSON body returns 400 error
- Payment not included or insufficient USDC returns 402 Payment Required

## 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 the z-scores for each data point along with computed mean and standard deviation, and a 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-174753e6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from numnumora.vercel.app](https://www.zero.xyz/host/numnumora.vercel.app/llms.txt)