A good API is not just easy to use but also hard to misuse: Creating a Robust API!

When building modern web applications, especially those with a complex microservices architecture, a Backend for Frontend (BFF) pattern is often employed. This pattern involves creating a dedicated backend service tailored to the needs of a specific frontend application, providing a simplified and optimized interface. However, creating a good API is more than just making it easy to use — it should also be difficult to misuse. This principle is crucial when designing APIs to ensure robustness, reliability, and ease of integration.

To achieve this, we will explore how to build a well-documented, easy-to-use, and hard-to-misuse API using Swagger (OpenAPI) for a Node.js backend. This API will act as a BFF for an Angular frontend application. We will cover everything from setting up Swagger in a Node.js application to integrating and consuming this API in an Angular application, along with best practices for API design.