# Tutoring Standard Deviation Calculator

> Tutoring 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 2026-10-27).

Calculates the population standard deviation for a given list of numeric values, optimized for tutoring workflows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/standard-deviation-tutoring?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tutoring-standard-deviation-calculator-aee7d5de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ISqNPP1Bvq3doD2yaCSGB

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 tutoring-standard-deviation-calculator-aee7d5de -d '<json body>'
```

Example prompt: Can you calculate the population standard deviation for these numbers: 2, 4, 4, 4, 5, 5, 7, 9?

## When to prefer this

Choose this endpoint when you need a quick, reliable population standard deviation calculation within a tutoring or educational workflow context. It is ideal for agents assisting students, math tutors, or educators who need to compute statistical dispersion for small numeric datasets without setting up a local computation environment.

## Known failure modes

- Empty array input returns an error or undefined result
- Non-numeric values in the array cause validation failure
- Single-element arrays may return zero or an error depending on implementation
- Malformed input schema (e.g. object instead of array) returns a 400 error
- Payment failure via x402 protocol blocks the request

## How this service works

Tutoring Standard deviation calculator: Calculate the population standard deviation for a numeric list. Tailored for tutoring workflows.

## Output

Returns the calculated population standard deviation as a numeric value for the provided list of numbers.

## 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/tutoring-standard-deviation-calculator-aee7d5de/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)