Webhook

Putting a Webhook as Action on your form means that when someone completes the form, a POST call will be made to the specified URL with the form’s data sent as JSON.

In other words, webhooks are a useful way to get data sent to an external system in near real time. Thus, with webhooks you can build integrations with other systems to get even more functionality via your forms.

The call will be server-side, if you want to secure your endpoint, it is possible to enter a key which will then be sent with the call under the name simpliform_auth and can then be validated on the receiving side.