# Keyword Density Checker API

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

One-, two- and three-word keyword density with stop-word filtering and word counts.

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

- Slug: `keyword-density-checker`
- Category: `webmaster`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 524288 bytes
- Privacy mode: `no_body_logs`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/keyword-density-checker/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/keyword-density-checker/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `text` | `str` | yes | content to analyse |
| `exclude_stop_words` | `str` | no | yes | no Choices: yes, no |
| `min_length` | `int` | no | minimum word length |
| `top_n` | `int` | no | how many phrases to return per group |

## Example request

```json
{
  "text": "SEO content optimization improves SEO rankings. Good SEO content wins.",
  "exclude_stop_words": "yes",
  "min_length": 3,
  "top_n": 5
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/keyword-density-checker/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"text":"SEO content optimization improves SEO rankings. Good SEO content wins.","exclude_stop_words":"yes","min_length":3,"top_n":5}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "keyword-density-checker",
  "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 Keyword Density Checker API do?

One-, two- and three-word keyword density with stop-word filtering and word counts. 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: text. Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

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