# Random Letter Generator API

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

Generate random letters with case, vowel/consonant, and duplicate controls.

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

- Slug: `random-letter-generator`
- Category: `random`
- 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/random-letter-generator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/random-letter-generator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `count` | `int` | no |  |
| `letter_case` | `str` | no | upper | lower | mixed Choices: upper, lower, mixed |
| `letter_type` | `str` | no | all | vowels | consonants Choices: all, vowels, consonants |
| `allow_duplicates` | `str` | no | yes | no Choices: yes, no |
| `seed` | `int | None` | no |  |

## Example request

```json
{
  "count": 8,
  "letter_case": "upper",
  "letter_type": "all",
  "allow_duplicates": "yes"
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/random-letter-generator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"count":8,"letter_case":"upper","letter_type":"all","allow_duplicates":"yes"}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "random-letter-generator",
  "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 Random Letter Generator API do?

Generate random letters with case, vowel/consonant, and duplicate controls. 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: (none). Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

No. This tool can vary by request. Tool version: 2026-04-22.