The account, plan and this month's usage behind the presented key (no secrets)

Returns the tenant, tier and key prefix, plus the plan name, the monthly call limit, calls used and remaining this period (this call included), and when the count resets (00:00 UTC on the 1st). The same figures are on every keyed response as RateLimit-Limit, RateLimit-Remaining and RateLimit-Reset (seconds until the reset).