Wow current mythic keystone per char info retrieval?

Is there a way to retrieve WOW current Mythic Keystone per character?
So far I do not see how to retrieve those data using Blizzard API.

I would like to create a list of all available m+ keys for a group of people I play with M+, including all chars, but I do not see how I can retrieve that info.

Hi Wandal.

No, there is no web API for character inventory.