Event when a tag is removed from the topic

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Strongly suggest you read more about webhooks and try them out

Configure webhooks that trigger on Discourse events to integrate with external services

A webhook is a way to notify external services about changes on the internet. It’s easier to setup, manage and develop than a Discourse plugin. Though, it does require you to program a little bit or understand its technical details. In this howto, I’ll set up webhook to power a Github bot for referencing pull request brought in a forum. We’ll want to see a new comment on Github pull request when a new post has a link to it. It’s a very simple process: Publish a new post. A webhook event happ…