api-patterns

Standardize API design patterns for routes, server actions, and integrations in Next.js App Router projects.

59|12|Updated Feb 26, 2026
One-click install
npx skills add https://github.com/etylsarin/opencastle --skill api-patterns-etylsarin
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: api-patterns
Source: https://github.com/etylsarin/opencastle/tree/main/src/orchestrator/skills/api-patterns
Command: npx skills add https://github.com/etylsarin/opencastle --skill api-patterns-etylsarin

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Patterns and guidance for building consistent API endpoints across framework-agnostic projects, covering route handlers, server actions, and proxy layers to reduce duplication and errors.

Core Features & Use Cases

  • Route Handler patterns for input validation, error handling, and responses.
  • Server Actions for mutations with clear separation of concerns and security checks.
  • Proxy layer and architecture guidelines for rate limiting, fingerprinting, and external API integration.
  • Real-world use case: standardize an inventory API across Next.js App Router and similar frameworks.

Quick Start

Use the api-patterns guidelines to implement a new route handler or server action with validated input and consistent error handling.

Frequently Asked Questions about api-patterns

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

FAQPage Schema
How do I standardize API design patterns for Next.js App Router server routes?

Standardize server route API patterns by enforcing input validation, consistent error handling, and versioning across route handlers and server actions to reduce duplication and errors.

What are the best patterns for handling errors and validation in server actions?

Server actions patterns enforce clear separation of concerns, security checks, and input validation before mutations to ensure robust and consistent error handling.

How do I implement rate limiting and proxy layers for external API integrations?

Implement rate limiting and proxy layers for external API integrations using architecture guidelines that cover fingerprinting and external requests to secure server-rendered endpoints.

Can I use these API patterns for CRUD operations in framework-agnostic projects?

Yes, you can apply these API patterns for CRUD operations in framework-agnostic projects, as they provide standardized guidance for route handlers and external integrations.

When do I need API versioning and standardized responses for authenticated endpoints?

You need API versioning and standardized responses for authenticated endpoints when implementing data fetching and mutations to ensure consistent error handling across your application.