# Simple System Architecture Flowchart Explained

> Published on ADIN (https://adin.chat/s/simple-system-architecture-flowchart-u4rd)
> Type: Diagram
> Date: 2026-03-02
> Description: Explore a clear flowchart detailing user requests, API gateway processing, authentication, business logic, and database interactions.

Mermaid diagram:
graph TD
    A["User Request"] --> B["API Gateway"]
    B --> C["Auth Service"]
    B --> D["Business Logic"]
    D --> E["Database"]
    D --> F["External API"]
    E --> D
    F --> D
    D --> G["Response to User"]