Trello Webhooks API

The Trello Webhooks API allows developers to receive real-time notifications when changes occur on Trello models such as boards, lists, and cards. Rather than polling the REST API for updates, webhooks push event data to a specified callback URL via HTTP POST requests containing JSON payloads. Webhook requests are signed with HMAC-SHA1 for verification, and webhooks are scoped to the permissions of the token used to create them.