Ship an AI agent without loop limits and cost guardrails, and your cloud bill becomes the real product demo.

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Shipping AI agents into production SaaS without cost guardrails can cause runaway cloud bills. This piece introduces 'FinOps for Agents,' a discipline covering loop limits, tool-call caps, token budgets, and the Cost-per-Accepted-Outcome (CAPO) metric. It breaks down the agentic COGS stack (model inference, tools, orchestration, memory, governance, human review), explains how to meter value at different scopes (assistance, action, workflow, task), and outlines five budget guardrails. Practical design patterns—separating planning from execution, routing to the smallest capable model, and making tools idempotent—are presented alongside a maturity model from seat-bundled to value-based contracts, plus a 30-60-90 day implementation plan.

FinOps for agents: Loop limits, tool-call caps and the new unit economics of agentic SaaS