United Kingdom (GB) VAT & VIES Validator

{
  "valid": true,
  "countryCode": "GB",
  "countryName": "United Kingdom",
  "vatNumber": "GB123456789",
  "syntaxValid": true,
  "checksumValid": true,
  "rates": {
    "standardRate": 20,
    "reducedRates": [
      5
    ],
    "effectiveYear": 2026
  }
}

curl --request POST \
  --url "https://eu-uk-vat-validator-rate-engine.stanzaapi.com/api/v1/vat/validate" \
  --header "Content-Type: application/json" \
  --header "x-api-key: YOUR_API_KEY" \
  --data '{
  "vatNumber": "DE123456789"
}'

const response = await fetch("https://eu-uk-vat-validator-rate-engine.stanzaapi.com/api/v1/vat/validate", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "x-api-key": process.env.API_KEY || "YOUR_API_KEY"
  },
  body: JSON.stringify({
  "vatNumber": "DE123456789"
})
});

const data = await response.json();
console.log(data);

import requests
import json

url = "https://eu-uk-vat-validator-rate-engine.stanzaapi.com/api/v1/vat/validate"
headers = {
    "Content-Type": "application/json",
    "x-api-key": "YOUR_API_KEY"
}
payload = {
    "vatNumber": "DE123456789"
}

response = requests.post(url, json=payload, headers=headers)
print(response.json())

package main

import (
	"bytes"
	"fmt"
	"io"
	"net/http"
	"os"
)

func main() {
	url := "https://eu-uk-vat-validator-rate-engine.stanzaapi.com/api/v1/vat/validate"
	payload := []byte(`{"vatNumber":"DE123456789"}`)

	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(payload))
	req.Header.Add("Content-Type", "application/json")
	req.Header.Add("x-api-key", os.Getenv("API_KEY"))

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)
	fmt.Println(string(body))
}