Hi @Александр Смирнов
This would be a really great question to share in our developer community.
We have a few Trello Engineers that are active there, and they or some of the community champions would be happy to give some guidance for more advanced topics like these.
https://community.developer.atlassian.com/c/trello
My colleague already gave me one of the reasons:"Trello does not sends x-trello-webhook on webhook setting because user could write wrong hook url. Subsecuent requests contains this header"
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