How to Secure an AI Agent With LlamaIndex + Descope

A tutorial demonstrates how to build a secure LlamaIndex daily-planning agent backed by Descope’s Agentic Identity Hub and an MCP server, addressing the risks of hardcoded or broadly shared credentials in autonomous AI workflows. The agent authenticates through Descope using Dynamic Client Registration and PKCE, sends a scoped bearer token to a FastMCP server, and accesses weather data, Google Calendar events, and Notion page creation tools only after server-side scope validation. Descope Connections stores each user’s WeatherAPI key, Google OAuth token, and Notion DCR-based OAuth credential separately, while the MCP server retrieves these credentials only at runtime, keeping them hidden from the agent and codebase. If a connection has not yet been authorized, each tool returns a user-facing authorization link rather than failing, after which Descope manages stored tokens and refreshes where needed. The LlamaIndex ReActAgent combines weather and schedule information into a structured Notion daily plan, while Descope provides user-specific access boundaries and audit records for authorization events, credential retrieval, and external actions.

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