NestJS API Standards

To standardize API responses in NestJS, use a generic TransformInterceptor to unify successful payloads into a consistent shape containing statusCode, data, and meta. This eliminates response format divergence and reduces client-side boilerplate across typical CRUD endpoints.

The best way to implement pagination in NestJS with Swagger is using strict PageOptionsDto and PageDto classes alongside an ApiPaginatedResponse decorator. This ensures consistent list endpoint payloads and automatically generates accurate Swagger documentation for paginated resources.

To handle errors consistently in NestJS APIs, implement a unified ApiErrorResponse schema containing statusCode, message, error, timestamp, and path. This standardizes error payloads globally or per-controller, ensuring reliable error handling and improving client integration experiences.

Yes, you can use a TransformInterceptor for nested resources in NestJS. It applies to typical CRUD endpoints and nested resource collections, wrapping all successful responses into the standard format to provide consistent payloads across your application architecture.

Yes, this NestJS response standardization approach works without external dependencies. It uses built-in decorators and interceptors to wrap responses, implement page-based pagination DTOs, and structure errors, requiring no additional libraries for integration into your existing application.