API Design - Next.js 16

What problem does it solve?

Coordinating internal Server Actions with external API Routes in Next.js 16 can become error-prone and hard to maintain without a clear pattern.

Core Features & Use Cases

• Server Actions–first guidance for internal operations.
• Clear separation of app/server logic from external endpoints (webhooks, public APIs).
• Reusable templates for validation, error handling, and response types across Next.js 16 apps.

Quick Start

Create a Next.js 16 API using app/api with a server action for internal logic and expose a public route with proper validation and error handling.