Custom wordpress plug in development to marge data wordpress and .net

He developer. I have software for my physical shop which is developed in .net platform. i have also a website site which is the same product as like shop but that's developed in WordPress. i maintain my product stock via .net software. now i need a custom plugin which actually marge the stock of my software and website. thats software online base. i contact with the company who sale the software to us. they said they will give an api with access to the database, where we can read and write data of product stock. so i need a plugin that takes stock data from the software server and updated it as per in my woo-commerce stock. data will be searched by bar code, so the workflow like from the website by bar code searching product stock from software takes the updated stock data from software and set in woo commerce. on the other hand, when something sold on my website that automatically minus product from stock in woocommece and software. in a word, I need a proper marge to both stocks. so my shop and website both will be work together.