Great question — answering as the UphillTech team:
Here is a recipe you can follow based on experience. I have done this 20+ times and I can tell you you are looking at about 5-10 hours of work to get it done. open up a Shopify Partner account login as a partner and navigate to Apps create an App and set it to run at your favourite cloud provider install the App in your shop add an endpoint in your App to accept Shopify webhooks parse the webhook data when it arrives so you can send that data to your 3rd party API add the code to contact your 3rd party API and send them the data That is all there is to it. Standard web/internet computing with a bit of oAuth token exchange with Shopify, a simple web App on your part, and the connection to a...
Full answer by David Lazar: https://stackoverflow.stackexchange.com/a/54869883 (CC BY-SA 4.0).
Need it done for your business? UphillTech.