# Statistics Calculator — REST API endpoint `statistics-calculator`

Descriptive statistics for a list of numbers: count, sum, mean, median, mode, min, max, range, variance, standard deviation, and the quartiles with the interquartile range. Accepts numbers separated by commas, spaces, semicolons or newlines. Sample or population standard deviation.

- Category: calculators
- MCP server: https://mcp.findutils.com/ (Streamable HTTP, no API keys, 120 req/min per IP)
- REST endpoint: POST https://api.findutils.com/api/tools/statistics-calculator/execute (no API keys, 60 req/min per IP)
- Reference page: https://findutils.com/api/statistics-calculator/
- Same tool on the other surface: https://findutils.com/mcp/statistics-calculator/

## Call the endpoint (verified example)

```bash
curl -X POST https://api.findutils.com/api/tools/statistics-calculator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "numbers": "2, 4, 4, 4, 5, 5, 7, 9"
  }'

# Parameter schema
curl https://api.findutils.com/api/tools/statistics-calculator
```

## Input schema

| Argument | Type | Required | Description |
|---|---|---|---|
| `numbers` | string | yes | The numbers, separated by commas, spaces, semicolons or newlines. An array of numbers is also accepted. |
| `deviation` | string (sample \| population) | no | "sample" divides by n-1 (the default, for a sample of a larger group); "population" divides by n. Default: `"sample"`. |

Example arguments (verified):

```json
{
  "numbers": "2, 4, 4, 4, 5, 5, 7, 9"
}
```

OpenAPI 3.1 spec: https://findutils.com/api/openapi.json · Interactive docs: https://findutils.com/api/docs/

## Also an MCP tool

```bash
claude mcp add findutils --transport http https://mcp.findutils.com/
```

Then ask the client to call `findutils:statistics_calculator`. Full MCP reference: https://findutils.com/mcp/statistics-calculator/

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