Seeing where the money goes: usage APIs, per-user attribution, budgets and alerts.
Hard caps versus soft alerts, per-tenant budgets, rate limits as a cost control, detecting agent runaway loops, and the escalation runbook that turns a spike into a ticket instead of a board conversat...
Tagging strategy, computing cost from usage fields, unit economics, and chargeback that survives an audit — including the awkward cases of cached and batched calls.
Native usage APIs, observability platforms, gateway metering and OpenTelemetry — what each layer actually gives you, what it costs you, and how to pick without locking yourself in.
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