I believe this is something you can do with the HTTP Requests feature in Butler. This should let you send a POST request to a URL when your particular trigger happens. We have a bit more detail on that here: https://help.trello.com/article/1203-issuing-http-requests-with-butler
Congratulations to @Laura Holton , our latest winner of Taco Tuesday! And thanks to @Kristjan Geir Mathiesen - Origo for sharing the picture of Taco having fun with his new friend...
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