apix

Implement contract-first REST APIs in Next.js with Zod validation.

1|Updated Mar 10, 2026

Search Tags:#api #openapi #validation #rest #zod #nextjs

Ready to run

npx skills add https://github.com/dduquenne/unanima-platform --skill apix

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: apix
Source: https://github.com/dduquenne/unanima-platform/tree/main/.claude/skills/apix
Command: npx skills add https://github.com/dduquenne/unanima-platform --skill apix

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

API design and quality in Next.js monorepos can be inconsistent, leading to fragile integrations and unclear contracts between frontend and data layers. Apix provides a structured blueprint to enforce standard patterns, validation, and error handling across the API surface.

Core Features & Use Cases

Contract-first API design with explicit input/output schemas (Zod) and standardized error responses.
Route Handler patterns, middleware-based auth, and reusable API helpers to ensure consistency in Next.js applications.
Supports OpenAPI documentation and inter-package contracts for monorepos, improving reliability and testability.

Quick Start

Apply Apix to your Next.js API Route Handlers to enforce standardized validation, error handling, and contract-driven API design.

Frequently Asked Questions about apix

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

FAQPage Schema

How do I enforce contract-first API design in Next.js applications?▼

Contract-first API design in Next.js is enforced by applying explicit input and output schemas using Zod, standardized error responses, and middleware-based auth within Route Handlers to ensure consistent and testable REST endpoints.

What is the best way to standardize validation and error handling for REST APIs in a Next.js monorepo?▼

To standardize REST APIs in a Next.js monorepo, use reusable API helpers and Zod schemas for validation to support inter-package contracts, ensuring reliability and structured error responses across the API surface.

Can I generate OpenAPI documentation from Next.js Route Handlers using Zod schemas?▼

Yes, OpenAPI documentation compatibility is supported through structured patterns and reusable helpers applied to Next.js Route Handlers, ensuring well-documented endpoints that meet explicit input and output schema requirements.

How do I structure pagination and standardized error codes in Next.js REST APIs?▼

Pagination and standardized error codes are structured in Next.js REST APIs by meeting explicit schema requirements through reusable helpers, ensuring consistent API contracts and standardized error responses across the application.

Why does API quality become inconsistent in Next.js monorepos, and how can middleware auth help?▼

API quality becomes inconsistent in Next.js monorepos due to fragile integrations and unclear contracts, which middleware-based auth and structured validation patterns resolve by enforcing standard access control and reliable API layers.