# School Standard Deviation Calculator

> School Standard Deviation Calculator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Calculates the population standard deviation for a list of numeric values, optimized for school-related workflows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/standard-deviation-school?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/school-standard-deviation-calculator-f28272fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZNQl5j1KbT5sqIZELZ-5G

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 school-standard-deviation-calculator-f28272fd -d '<json body>'
```

Example prompt: Can you calculate the population standard deviation for these student test scores: 72, 85, 90, 68, 77, 95, 88, 73?

## When to prefer this

Choose this endpoint when you need a quick, low-cost population standard deviation calculation for educational or school contexts, particularly when processing student scores or class datasets. Best suited for small to medium numeric arrays where a simple statistical spread metric is sufficient.

## Known failure modes

- Empty array input may return an error or undefined result
- Non-numeric values in the array will likely cause a validation error
- Single-element arrays return a standard deviation of 0
- Very large arrays may time out or produce precision issues

## How this service works

School Standard deviation calculator: Calculate the population standard deviation for a numeric list. Tailored for school workflows.

## Output

Returns the population standard deviation as a numeric value computed from the provided array of numbers, reflecting the average dispersion of values from the mean across the entire dataset.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "values": {
   "type": "array",
   "items": {
    "type": "number"
   },
   "default": [
    2,
    4,
    4,
    4,
    5,
    5,
    7,
    9
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/school-standard-deviation-calculator-f28272fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)