There are inconsistencies between the URL fragments shown on the Account Activity API Reference Index and those shown in the detailed documentation, e.g., for manually triggering a CRC check, the index does not show that a webhook ID is required.
The target for the link to Premium Account Activity Subscriptions Count is incorrect. The correct link target is #get-account-activity-all-subscriptions-count .
Generally, the documentation (and perhaps the API?) is very inconsistent in terms of where the /all is part of the URL. I also wish that the Enterprise API and the Premium API were more consistent with each other; I’m working on a library that might be used by either and in many cases it shouldn’t be necessary (except for use of env_name) to use different URLs. But I suspect this horse has left the barn.