How do I calculate Sri Lanka VAT with an API?

GET/api/v1/vat

VAT Calculator API

Add or remove Sri Lankan VAT. mode=add adds VAT to a net amount; mode=remove extracts VAT from a gross amount. Rate defaults to the standard 18%.

Param	In	Required	Description
amount	query	yes	Amount in LKR.
rate	query	no	VAT rate %, default 18.
mode	query	no	add \| remove (default add).

curl "https://induwara.lk/api/v1/vat?amount=10000&rate=18&mode=add"

JavaScript (SDK):

import { InduwaraLK } from "https://induwara.lk/sdk/induwaralk.js";
const api = new InduwaraLK();
const data = await api.vat(/* … */);

{
  "ok": true,
  "data": {
    "mode": "add", "rate": 18, "base": 10000,
    "vat": 1800, "total": 11800, "currency": "LKR"
  }
}

How do I calculate Sri Lanka VAT with an API?: GET /api/v1/vat?amount=10000&rate=18&mode=add adds VAT to a net amount; mode=remove extracts VAT from a gross amount. The rate defaults to the standard 18%.