The VerticalResponse Webhooks API provides a way for your client application to create and maintain its own hook subscriptions through a REST API. Webhooks can be created in VerticalResponse and used to create, update, delete or list the Webhooks you have created. This requires that use the client id and access token just as you would for any other VR API. VerticalResponse Webhooks implementation supports the following three events; Contact Create, Contact Unsubscribe, and Uploading a list of contacts. VerticalResponse develops email marketing solutions and Social Media Marketing to create, send, and track emails and social posts on every device.