Introduction

A webhook is a callback function based on the HTTP protocol.

It allows a remote API to establish event-oriented communication with the HUB2 API.

In simple words, events can be subscribed on the HUB2 API and whenever such event occurs, the remote API will be called using the HTTP protocol.

To subscribe a webhook, the list of events to listen to must be provided alongside an URL which will be called.

Doing so remove the necessity to perform polling on the HUB2 API to know the current status of a transaction. Instead the HUB2 API will automatically reach the provided URL with all useful data in the request body to let the remote API know an update occurred.