The metrics endpoint (https://api.warmupinbox.com/api-doc#/%F0%9F%93%A9%20Inboxes/getInboxMetrics) supports fetching granular warmup metrics by date.
However, it does not support fetching granular metrics by date AND by email service provider.
It is possible to retrieve the reputation metrics by ESP using get details endpoint (https://api.warmupinbox.com/api-doc#/%F0%9F%93%A9%20Inboxes/getInboxDetails). However, the approach forbids us calculating our own reputation per email service provider.