For the complete documentation index, see llms.txt.

VAT Calculator API

finance 2 credits / call v2026-04-22

Add, remove, or extract VAT from an amount using a preset or custom rate.

One POST adds VAT Calculator to your app, site, workflow, or agent — formula, validation, edge cases, and docs already handled.

prefer a UI? open VAT Calculator on miniwebtool.com →

Start Starter → Requires Starter+ · $29/mo
Starts on Starter
Free keys can view docs and examples, but calls to this endpoint require Starter or higher.
Start Starter →

Endpoint

POST · 2cr
POST https://api.miniwebtool.com/v1/tools/vat-calculator/run

Request body

Field Type Req.
amount float
calc_mode
add | remove | extract
str
country
custom | gb | de | fr | it | es | nl | au | nz | ca | in | sg
str
vat_rate_percent float | None
precision int

Cost & access

  • 2 credits per successful call — failed calls refund.
  • Starts on: Starter or higher.
  • Max payload: 65536 bytes.
  • Privacy mode: hash_only
  • Available on: starter, pro, business, scale

Response envelope

{
  "request_id": "01K...",
  "tool": "vat-calculator",
  "tool_version": "2026-04-22",
  "credits_used": 2,
  "result": { ... }
}

Try it

Stored only in this browser tab. Playground test key is prefilled and only works on this page. Get a live key →
add | remove | extract
custom | gb | de | fr | it | es | nl | au | nz | ca | in | sg

Code examples

curl -X POST https://api.miniwebtool.com/v1/tools/vat-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"amount":100,"calc_mode":"add","country":"gb"}'
import requests

resp = requests.post(
    'https://api.miniwebtool.com/v1/tools/vat-calculator/run',
    headers={'Authorization': 'Bearer mwt_live_YOUR_KEY'},
    json={'amount': 100, 'calc_mode': 'add', 'country': 'gb'},
)
resp.raise_for_status()
print(resp.json())
const resp = await fetch(
  'https://api.miniwebtool.com/v1/tools/vat-calculator/run',
  {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer mwt_live_YOUR_KEY',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({"amount":100,"calc_mode":"add","country":"gb"}),
  }
);
const data = await resp.json();
console.log(data);
<?php
$ch = curl_init('https://api.miniwebtool.com/v1/tools/vat-calculator/run');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer mwt_live_YOUR_KEY',
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
    'amount' => 100,
    'calc_mode' => 'add',
    'country' => 'gb'
]),
]);
$resp = curl_exec($ch);
curl_close($ch);
print_r(json_decode($resp, true));
require 'net/http'
require 'json'
require 'uri'

uri = URI('https://api.miniwebtool.com/v1/tools/vat-calculator/run')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = (uri.scheme == 'https')

req = Net::HTTP::Post.new(uri)
req['Authorization'] = 'Bearer mwt_live_YOUR_KEY'
req['Content-Type'] = 'application/json'
req.body = {
  'amount' => 100,
  'calc_mode' => 'add',
  'country' => 'gb'
}.to_json

resp = http.request(req)
puts JSON.parse(resp.body).inspect
package main

import (
  "bytes"
  "encoding/json"
  "fmt"
  "io"
  "net/http"
)

func main() {
  body, _ := json.Marshal(map[string]interface{}{
    "amount": 100,
    "calc_mode": "add",
    "country": "gb",
  })
  req, _ := http.NewRequest("POST", "https://api.miniwebtool.com/v1/tools/vat-calculator/run", bytes.NewReader(body))
  req.Header.Set("Authorization", "Bearer mwt_live_YOUR_KEY")
  req.Header.Set("Content-Type", "application/json")

  resp, err := http.DefaultClient.Do(req)
  if err != nil { panic(err) }
  defer resp.Body.Close()
  out, _ := io.ReadAll(resp.Body)
  fmt.Println(string(out))
}
import java.net.URI;
import java.net.http.*;

var client = HttpClient.newHttpClient();
var req = HttpRequest.newBuilder()
    .uri(URI.create("https://api.miniwebtool.com/v1/tools/vat-calculator/run"))
    .header("Authorization", "Bearer mwt_live_YOUR_KEY")
    .header("Content-Type", "application/json")
    .POST(HttpRequest.BodyPublishers.ofString("{\"amount\":100,\"calc_mode\":\"add\",\"country\":\"gb\"}"))
    .build();

var resp = client.send(req, HttpResponse.BodyHandlers.ofString());
System.out.println(resp.body());
how-to call vat-calculator
  1. Get an API key
    Get an API key. Choose the Starter plan or higher to receive a bearer token with access to this endpoint.
  2. Assemble the JSON body
    Required fields: amount, . See the Request body table above for the full schema.
  3. POST to https://api.miniwebtool.com/v1/tools/vat-calculator/run
    Headers: Authorization: Bearer <key> and Content-Type: application/json. Copy-paste snippets in 7 languages are under Code examples.
  4. Parse the response
    Envelope: {request_id, tool, tool_version, credits_used, result}. The typed output lives in result.
faq frequently asked
What does the VAT Calculator API do?+

Add, remove, or extract VAT from an amount using a preset or custom rate. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

How much does one call to VAT Calculator cost?+

2 credits per successful call. Failed calls (validation errors, 5xx) don't bill.

What parameters does the VAT Calculator API require?+

Required fields: amount. Full schema at /v1/openapi.json.

Is the VAT Calculator API deterministic?+

Yes — same input, same output, forever. Tool version 2026-04-22; output shape is stable within a major version.

Can an AI agent call the VAT Calculator API?+

Yes. Connect to https://api.miniwebtool.com/v1/mcp over the Model Context Protocol. The agent discovers `vat-calculator` with its JSON Schema automatically, so the model can plan while MiniWebtool handles the exact tool result.

What format does the API return?+

JSON with a stable envelope: `{request_id, tool, tool_version, credits_used, result}`. Errors are RFC 7807 `application/problem+json`.

mcp use from an AI agent

Every endpoint on this site is also exposed via the Model Context Protocol at https://api.miniwebtool.com/v1/mcp. Claude, Cursor, and any MCP-capable agent can discover this tool (vat-calculator) and its JSON Schema automatically — no client codegen.

# List tools the agent can call
curl -s https://api.miniwebtool.com/v1/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' \
 | jq '.result.tools[] | select(.name=="vat-calculator")'
see-also related finance tools