# CRC32 Checksum Calculator API

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

Calculate the IEEE CRC32 checksum of text in hex, decimal, and binary form.

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

- Slug: `crc32-checksum-calculator`
- Category: `hash`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 262144 bytes
- Privacy mode: `no_body_logs`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/crc32-checksum-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/crc32-checksum-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `text` | `str` | yes |  |
| `encoding` | `str` | no | utf-8 | ascii | latin-1 | utf-16 | utf-32 Choices: utf-8, ascii, latin-1, utf-16, utf-32 |

## Example request

```json
{
  "text": "Hello World!",
  "encoding": "utf-8"
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/crc32-checksum-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"text":"Hello World!","encoding":"utf-8"}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "crc32-checksum-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 CRC32 Checksum Calculator API do?

Calculate the IEEE CRC32 checksum of text in hex, decimal, and binary form. 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.