API Design and Development
Designing Before Building
Good API design starts before any code is written - defining endpoints, request/response structures, and naming conventions upfront reduces rework later.
Postman's API Builder
Postman includes an API definition workflow where you can define an API's schema (often using OpenAPI), generate a matching collection, and keep design and implementation linked together.
Core Design Principles
| Principle | Description |
|---|---|
| Consistent naming | Predictable resource and endpoint names |
| Proper HTTP methods | GET for reads, POST for creation, etc. |
| Clear error responses | Meaningful status codes and messages |
From Design to Testing
Once an API is designed in Postman, the same collection can be used for mocking, documentation, and testing - keeping the whole lifecycle in one place.
Designing and building an API is only the beginning - APIs also need to evolve safely over time, which brings us to versioning and maintenance.
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