urlfetch.js

//Constants
const inventory_sheet = "inventory"
const item_id_column = 1
const quantity_column = 3
const price_column = 4
const regular_price_column = 5
const consumer_key = "s3cr3t"
const consumer_secret = "s3cr3t"
const order_id_column = 1
const status_column = 8
const ordered_items_column = 4
const variation_id_column = 6

function onEdit(e) {
    var sheet = e.source.getActiveSheet()
    sheet_name = sheet.getName()
    //Updating Inventory
    var range = e.range
    var item_id = sheet.getRange(range.getRow(), item_id_column).getValue()

    //Updating Stock Quantity
    if (sheet_name == "inventory") {
        if (e.range.getColumn() == quantity_column) {
            var request_body = {
                "stock_quantity": e.value
            }
        }

        //Updating Sale Price
        else if (e.range.getColumn() == price_column) {
            var request_body = {
                "sale_price": e.value
            }
        }

        //Updating Regular Price
        else if (e.range.getColumn() == regular_price_column) {
            var request_body = {
                "price": e.value,
                "regular_price": e.value
            }
        }
        var options = {
            'method': 'put',
            'contentType': 'application/json',
            'payload': JSON.stringify(request_body)
        }
        UrlFetchApp.fetch("https://my-secret-woocommerce-site" + item_id + "?consumer_key=" + consumer_key + "&consumer_secret=" + consumer_secret, options)
    }
}