Get the period's charges in brief: total, active locations, and any overage, with one row per account. Use this for a billing header. Defaults to the current month; send year and month for another period.

Prerequisites: a Partner bearer token. Optional: year and month (default: the current month).

Authentication: Partner token. It covers the accounts directly under your own partner; any other token gets 403.

Rate limit: 120 requests per minute, counted per user (the token’s user).