---
lang: en
title: 'SOAP calculator Web Service integration tutorial'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI, Tutorial
layout: readme
source: loopback-next
file: examples/soap-calculator/README.md
sidebar: lb4_sidebar
permalink: /doc/en/lb4/soap-calculator-tutorial.html
summary: LoopBack 4 SOAP Web Service Tutorial
---