# Vat Calculator — MCP tool `findutils:vat_calculator`

Return the net amount, the VAT (or sales tax) amount, and the gross amount for a price. Mode add treats the amount as net and adds tax; modes remove and extract treat the amount as gross and take the tax out.

- Category: finance
- 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/vat-calculator/execute (no API keys, 60 req/min per IP)
- Reference page: https://findutils.com/mcp/vat-calculator/
- Same tool on the other surface: https://findutils.com/api/vat-calculator/

## Connect

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

Claude Desktop (`claude_desktop_config.json`):

```json
{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}
```

## Call the tool (verified example)

```bash
curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "vat_calculator",
      "arguments": {
        "amount": 100,
        "vat_rate": 20,
        "mode": "add"
      }
    }
  }'
```

## Input schema

| Argument | Type | Required | Description |
|---|---|---|---|
| `amount` | number | yes | The price. Net for mode add; gross for modes remove and extract. |
| `vat_rate` | number | yes | Tax rate in percent (20 = 20%). |
| `mode` | string (add \| remove \| extract) | no | add, remove, or extract. Default: add. |

Example arguments (verified):

```json
{
  "amount": 100,
  "vat_rate": 20,
  "mode": "add"
}
```

## Also a REST endpoint

```bash
curl -X POST https://api.findutils.com/api/tools/vat-calculator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "amount": 100,
    "vat_rate": 20,
    "mode": "add"
  }'

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

Full REST reference: https://findutils.com/api/vat-calculator/ · OpenAPI 3.1 spec: https://findutils.com/api/openapi.json

---
Full catalog: POST https://mcp.findutils.com/ with method `tools/list` · https://findutils.com/mcp/ · https://findutils.com/llms.txt