Can I use Corvix to integrate Wix Shop to another service? After order received, I would need to forward the order data via an external API. Can this be done?
Look at using an event from the Wix Stores Backend.
https://www.wix.com/corvid/reference/wix-stores-backend.Events.html
Then you would need to expose your site to the external API and pass on the data that you want to be sent over to your external API.
https://www.wix.com/corvid/forum/community-discussion/wix-store-external-api