API Design Examples - Best Practices and Patterns

A well-designed API forms the backbone of modern software architectures. Whether you use REST, GraphQL or gRPC — consistent design, clear naming and robust error handling make the difference between a maintainable and a chaotic integration layer.

RESTful resource hierarchy for e-commerce

A webshop built a REST API with logical resource hierarchy: /customers/{id}/orders, /products/{id}/variants. HATEOAS links in responses enabled discoverable navigation.

• Consistent URL structure and HTTP verbs
• Versioning via Accept header
• Rate limiting per client

GraphQL for flexible frontend queries

A SaaS platform chose GraphQL so mobile and web clients fetch exactly the data they need. N+1 queries were prevented with DataLoader batching.

• Schema-first development with TypeScript
• DataLoader for batch and cache optimisation
• Strict query depth limiting against over-fetching

Key takeaways

• Version APIs from day one — backward compatibility saves migrations.
• Document with OpenAPI/Swagger; automate client code generation.
• Consider rate limiting, authentication and error responses from the start.

How MG Software can help

MG Software designs APIs that scale, are secure and easy to consume. From REST to GraphQL — we build API contracts your integration partners will appreciate.