@Raphael Bochner  Wondering if this is still an issue for you?  I noticed although the status.intercom.com seems to show all green, there was a note earlier saying that Zapier was failing and causing issues with the API or something.   I wonder if this timing was also around when you were having issues?

Maybe check and see if things are working smoothly again, if so maybe whatever was happening was related.  If you are still having the issue let us know and hopefully someone from the Intercom team can help you dig into it. 

See screenshot below from the Status page

 

yup indeed this was resolved and seemed to be the issue