Is it possible to make it that when someone clicks the Submit button on a form, it sends the response to a webhook?
You can do this by getting HTML code from a 3rd party service that would typically be embedded in the web page or an iFrame. Using Corvid, you can embed this same HTML code in a $w.HtmlComponent which is a sort of Wixian iFrame. You can learn how this is done in the article Working with the HTML Component in Wix Code .
Or you could send the response using Fetch . Just get the endpoint of the destination webhook where you need to send the data.