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56. API Gateway / Gatekeeper Pattern

Mini-Project: API Gateway for Agent Access Control

A centralized gateway that enforces authentication, rate limiting, and request schema validation before forwarding requests to the target agent, logging all activity.

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Description

Prevents unauthorized access, rate abuse, and unmonitored agent activity. Centralizes authentication, rate limiting, and request logging for all agent interactions.

All agent requests pass through a centralized gateway that enforces authentication, rate limits, request validation, and logging before forwarding to the target agent.

Architecture Diagram

flowchart TD
    A[Client] --> B[API Gateway]
    B --> C{Auth Valid?}
    C -->|No| D[401 Unauthorized]
    C -->|Yes| E{Rate Limit OK?}
    E -->|No| F[429 Too Many Requests]
    E -->|Yes| G[Forward to Agent]
    G --> H[Agent Response]
    H --> I[Log & Return]

    style B fill:#FF5722,color:#fff
    style D fill:#F44336,color:#fff
    style F fill:#F44336,color:#fff