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nextjs-api-patterns

Implement type-safe Next.js App Router handlers with Zod validation.

Updated Dec 4, 2025
Search Tags:#typescript#api#middleware#zod#server actions#nextjs#route handlers
One-click install
npx skills add https://github.com/hiroto0701/dotfiles --skill nextjs-api-patterns
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: nextjs-api-patterns
Source: https://github.com/hiroto0701/dotfiles/tree/main/private_dot_claude/skills/nextjs-api-patterns
Command: npx skills add https://github.com/hiroto0701/dotfiles --skill nextjs-api-patterns

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a comprehensive set of best practices and patterns for implementing API endpoints, Server Actions, and middleware within the Next.js App Router, ensuring type safety, robust error handling, and efficient development.

Core Features & Use Cases

  • Type-Safe API Endpoints: Implement Route Handlers (route.ts) with Zod validation for request and response bodies, ensuring data integrity.
  • Unified Error Handling: Utilize a consistent error response format across all API routes and Server Actions.
  • Secure Server Actions: Develop Server Actions with built-in validation, revalidation, and redirection strategies.
  • Authentication Middleware: Implement robust authentication and authorization logic using Next.js Middleware.
  • Use Case: When developing a new API endpoint to create a user, use this Skill to define a Zod schema for the input, implement the POST handler with validation, and ensure a consistent error response if validation fails.

Quick Start

Use the nextjs-api-patterns skill to implement a type-safe POST request handler for the '/api/users' route using Zod validation.

Frequently Asked Questions about nextjs-api-patterns

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate request bodies in Next.js Route Handlers?▼

Next.js Server Actions implement progressive enhancement by allowing forms to function without JavaScript. You can develop secure Server Actions using built-in Zod validation, revalidation, and redirection strategies to handle submissions gracefully even if client-side JS fails to load.

What is the best way to handle errors consistently in Next.js API routes?▼

The best way to handle errors in Next.js API routes is to utilize a unified error response format across all Route Handlers and Server Actions. This approach ensures data integrity and predictable API behavior by standardizing how validation failures and exceptions are returned to clients.

Can I use Next.js Middleware for authentication in the App Router?▼

Yes, you can use Next.js Middleware for authentication in the App Router. It allows you to implement robust authentication and authorization logic, intercepting requests to protect routes before they reach your Server Actions or Route Handlers.

How do I create a type-safe POST handler for a Next.js API route?▼

To create a type-safe POST handler in Next.js, define a Zod schema for the input data, implement the POST function in `route.ts`, and validate the payload against the schema. Return a standardized error response if validation fails to ensure backend logic stability.

Does this Next.js API pattern require a specific version of the framework?▼

These Next.js API patterns require Next.js 13 or higher because they are designed specifically for the App Router architecture. They are applicable to TypeScript projects leveraging Route Handlers, Server Actions, and Middleware for backend API development.

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