How do I govern billable calls from AI agents in a AI platforms and model providers environment?

Route billable calls through Kastra. The Kastra proxy or SDK intercepts each request before it executes, evaluates ABAC policy against the request attributes, environment, principal identity, and risk signals, and returns an allow, deny, redact, or human-approval decision. AI platforms and model providers customers map controls directly to EU AI Act, NIST AI RMF, SOC 2.