# Spearman Rank Correlation Calculator API

> For the complete documentation index, see [llms.txt](/llms.txt).

Spearman's rho with average-rank tie handling, tie correction, and t-based significance.

Use this endpoint to add the tool to your app, site, workflow, or agent without rebuilding formulas, validation, examples, and docs.

- Slug: `spearman-rank-correlation-calculator`
- Category: `math`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 65536 bytes
- Privacy mode: `hash_only`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/spearman-rank-correlation-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/spearman-rank-correlation-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `x_data` | `str` | yes | X values separated by commas, spaces, or line breaks |
| `y_data` | `str` | yes | Y values separated by commas, spaces, or line breaks |
| `sig_level` | `str` | no | 0.01 | 0.05 | 0.10 Choices: 0.01, 0.05, 0.10 |

## Example request

```json
{
  "x_data": "1 2 3 4 5",
  "y_data": "2 3 5 4 6",
  "sig_level": "0.05"
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/spearman-rank-correlation-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"x_data":"1 2 3 4 5","y_data":"2 3 5 4 6","sig_level":"0.05"}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "spearman-rank-correlation-calculator",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": {}
}
```

## Errors

Errors are RFC 7807 `application/problem+json`. Branch on `code`, not `title`.

## MCP

Agents can discover and call this tool through `https://api.miniwebtool.com/mcp` or `https://api.miniwebtool.com/v1/mcp` using MCP `tools/list` and `tools/call`.

## Frequently asked

### What does the Spearman Rank Correlation Calculator API do?

Spearman's rho with average-rank tie handling, tie correction, and t-based significance. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

### How much does one call cost?

1 credit per successful call. Failed calls do not bill.

### What parameters are required?

Required fields: x_data, y_data. Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

Yes. Same input, same output. Tool version: 2026-04-22.