How to Secure an AI Agent With Claude Agent SDK + Descope

The tutorial demonstrates how to build a secure Claude Agent SDK application that plans a user’s day by retrieving weather data, reading Google Calendar events, and creating a Notion page, while using Descope’s Agentic Identity Hub to manage authentication, credentials, scopes, and auditing. A FastMCP server validates Descope-issued bearer tokens and enforces tool-specific permissions before retrieving user-scoped credentials at runtime from Descope Connections, including a WeatherAPI static key, a Google Calendar OAuth token, and a Notion OAuth token obtained through Dynamic Client Registration. Credentials remain outside the agent code and environment, and missing connections produce authorization links so users can grant access and rerun the agent. The setup uses PKCE and dynamic client registration for agent authentication, user-specific identities and tokens to prevent cross-user data access, and centralized logs that trace each credential lookup, authorization, and tool call. Once configured, the agent combines weather and calendar information into a schedule and priority plan, saves it to Notion, and illustrates an architecture intended to provide least-privilege access, secret isolation, token management, and accountability for autonomous agent workflows.

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