Why Real-Time Authorization Is Best For Agentic AI

API keys grant broad, long-lived access that violates least privilege and becomes especially dangerous with AI agents, which can make unpredictable API calls or be manipulated via prompt injection. Real-time authorization addresses this by using short-lived, scoped OAuth 2.0 access tokens enriched with contextual attributes (user, role, agent presence) to enforce dynamic, policy-driven access decisions. Key practices include zero standing privilege by default, human approval for high-privilege operations, dynamic client onboarding via OAuth mechanisms like Dynamic Client Registration, and integration with policy decision points. Gartner predicts over 50% of successful cyberattacks against AI agents through 2029 will exploit access control weaknesses, making this a critical architectural concern for enterprises deploying agentic systems.