API Gateway Simulator — Interactive System Design Lab

Route requests through an API gateway and observe how authentication, rate limiting, and path-based routing work together as a pipeline. Fire requests with missing tokens, exceed rate limits, and watch exactly where each request is rejected — and why gateways are the standard entry point for microservice architectures.

Route requests through a gateway and watch authentication, rate limiting, and routing enforce policy in sequence.

This free interactive simulation runs directly in your browser — no account needed. Adjust the parameters and watch how the system responds in real time.

Concepts covered

• API gateway
• rate limiting
• authentication
• microservices
• request routing

Read the guide

• API Gateway — The bouncer, the receptionist, and the translator. It decouples your messy backend microservices from the clean public-facing API.