As-mentioned here by Integromat:
It appears that there could be some improvements to how tag assignments on topics are exposed through the API. Specifically, the ability to query for newly-added tags on topics. My particular use case is to use tagging in Discourse to indicate that some topic should be exported to another system (a task manager, for example), and I’m planning to use Integromat to do that. But this could as easily apply to any system querying the API to determine if e.g. a “Create Task” tag has been added to a topic and then act on that information.
My understanding is the current API does not easily allow for that. There is a workaround with webhooks, but unless I’m mistaken, a direct API call would be cleaner and simpler.
Thanks for considering it! I hope I’ve put this in the right place.