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Securing AI Agents with MCP and Zero Trust Identity

Date Aired: March 24, 2026

What You’ll Learn

Securing AI agents exposes a gap your CIAM stack was never built to fill: agents aren't users. They don't have passwords, they don't get frustrated by MFA prompts, they can spin up a hundred instances in ten minutes, and when they go rogue, they do it at machine speed. FusionAuth's Dan Moore walks through the identity architecture that closes that gap. You'll leave with a concrete model for tracing authority from human principal to sub-agent, a clear understanding of why OAuth scopes aren't enough for agentic authorization, and two specific patterns (the token vault and sub-agent mutual authentication) for limiting the damage when something goes wrong.

Key Takeaways:

  • Agents need first-class identity, not shared service accounts. Because agents are non-deterministic, distinct identity per agent means you can trace actions back through logs, catch anomalies, and debug failures without guessing which agent touched which resource.
  • Human identity is the root of authority for every agent in a chain. An agent should never carry permissions that can't be traced back to a human principal or team that authorized them. Agents don't have inherent rights, they act on behalf of whoever configured them, the same way a cron job does.
  • OAuth scopes tell you what category of resource an agent can access. They don't let you say "read-only access to this specific folder for the next hour." For that granularity, you need Rich Authorization Requests or a fine-grained authorization layer behind your API. MCP's OAuth support is progress; it isn't sufficient on its own.
  • The token vault pattern removes long-lived credentials from the agent's reach entirely. The orchestration layer retrieves a short-lived access token on the agent's behalf, so a compromised agent ends up with something that expires in 60 seconds rather than a refresh token that can mint new access tokens indefinitely.
  • Sub-agents with mutual authentication are the practical implementation of zero trust for agentic systems. When sub-agents authenticate via mTLS or client credentials grant, a compromised document-retrieval agent can't reach the calendar API. The boundaries are logical rather than physical, but they're enforced.
  • MCP is not your only attack surface. Agents regularly call plain HTTP APIs, use SDKs, and invoke CLIs. Credential hygiene applies across every interaction pattern an agent uses, not just the one getting the most attention this year.
  • Human-in-the-loop approval is a real control, but alert fatigue breaks it fast. If your approval gate fires on every minor action, users click through without reading. Be deliberate about when it triggers.
View Transcript

Who Should Watch This Webinar?

  • Security architects
  • Identity engineers
  • Platform engineers
  • CTOs
  • CISOs
  • Developers building or integrating agentic systems

Topics Discussed:

  • Securing AI agents: where CIAM assumptions break down
  • Non-human identity: authentication methods, session models, and orchestration
  • Chain of identity and RFC 8693 token exchange
  • The act claim and delegation vs. impersonation in JWTs
  • MCP, OAuth scopes, and the case for fine-grained authorization
  • The token vault pattern and short-lived credential delivery
  • Sub-agent mutual authentication and zero trust architecture
  • Logging, tracing, and SIEM integration for agentic workflows
  • Human-in-the-loop patterns and the alert fatigue problem

Speakers:

Dan Moore Photo
Dan Moore
Sr. Director of CIAM Strategy, FusionAuth
Dan Moore has spent his career across the full stack of software leadership, from back-end developer and engineering manager to CTO and AWS certification instructor at organizations including Oracle and Culture Foundry. He holds AWS and identity certifications and has contributed to 97 Things Every Cloud Engineer Should Know. His speaking reflects where his interests have landed: Identiverse sessions on CIAM, OAuth compliance, and decentralized authentication; Devnexus workshops on enterprise authentication and microservice architectures; and webinars on passkeys, modern MFA, and identity challenges in agentic AI workflows. He's also been a featured guest on Corey Quinn's Screaming in the Cloud.
Featured TechPaper
Securing Autonomous AI Agents: A Technical Framework
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