API Gateway Microservices Pattern
A service-based platform where web, mobile, or partner clients enter through a single API gateway, then route to domain services with shared auth, caches, and a mix of synchronous requests and asynchronous events.
“Create an API gateway microservices architecture diagram with web app, mobile app, partner API client, API gateway, auth service, order service, inventory service, payment service, notification service, Redis cache, Kafka for async events, and separate PostgreSQL databases per service. Show synchronous gateway traffic separately from event-driven communication.”
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Scenario summary
A service-based platform where web, mobile, or partner clients enter through a single API gateway, then route to domain services with shared auth, caches, and a mix of synchronous requests and asynchronous events.
Why this architecture matters
- 1
It shows the boundary between external clients and internal services, which is often the first thing engineers need during design review.
- 2
It helps teams reason about routing, authentication, rate limiting, and where cross-cutting concerns belong without flattening the whole system.
- 3
It gives a clearer view of service ownership and downstream dependencies than a generic microservices diagram with no front door.
Refine it with follow-up prompts
After generating the base diagram, use these prompts to iterate and add detail — the same way a real architect would refine a whiteboard sketch.
- 1
“Add rate limiting, request logging, and mark which routes are public versus internal.”
Try this follow-up - 2
“Show timeout path when payment service is unavailable and annotate fallback behavior.”
Try this follow-up - 3
“Add internal admin API and indicate which service owns each database.”
Try this follow-up
What to emphasize in the diagram
- •Keep the gateway layer visually distinct from downstream domain services.
- •Show shared cross-cutting concerns like auth and caching without implying shared data ownership.
- •Separate synchronous request flow from async events so the architecture is easier to review.
How AIDrawIO generates this diagram
- 1.You paste the prompt above into the chat input.
- 2.AIDrawIO sends it to your chosen AI model (GPT-5, Claude, or Gemini).
- 3.The model returns draw.io-compatible XML — rendered instantly in the canvas.
- 4.Export as SVG, PNG, or XML. Edit any element manually or with follow-up prompts.
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Frequently asked questions
What should an API gateway microservices diagram include?
It should include client entry points, gateway layer, auth or routing controls, downstream domain services, owned data stores, and any queues or event buses used between services.
Why show the gateway separately from the services?
Because the gateway handles external traffic, routing, and cross-cutting controls. Keeping it separate makes the request path much easier to understand.