I wanted to get my usage information (operations and data transfer) without visiting the Integromat dashboard.
I checked their API document but I couldn't find the particular endpoint. So that I asked to the customer support.
From their answer, so far they don't provide such an API. However, I can get the usage data from the scenario.
There are two functions,
Since Integromat allows me to run multiple tasks in one scenario, just adding a new module that calls these functions and sends the values to my LINE Notify channel worked fine.