api-designer

Automate type-safe REST or GraphQL API design with Zod validation and OpenAPI generation.

5|1|Updated Feb 5, 2026
One-click install
npx skills add https://github.com/JasonWarrenUK/claude-code-config --skill api-designer-jasonwarrenuk
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: api-designer
Source: https://github.com/JasonWarrenUK/claude-code-config/tree/main/skills/api-designer
Command: npx skills add https://github.com/JasonWarrenUK/claude-code-config --skill api-designer-jasonwarrenuk

SYSTEM DOCUMENTATION & REQUIREMENTS

## What problem does it solve? This skill helps teams design robust, type-safe APIs in TypeScript with built-in validation, consistent error handling, and clear contracts.

## Core Features & Use Cases

  • Type-safe contracts: define request/response shapes that communicate intent and reduce runtime errors.
  • Validation patterns: integrate Zod schemas to validate inputs at the API boundary and derive TypeScript types.
  • API versioning and documentation: support versioned endpoints and OpenAPI-compatible documentation generation.
  • Example workflows: design REST endpoints, middleware, and error handling flows across services.

### Quick Start Build a minimal API skeleton featuring a CreateUser endpoint with typed request/response and a Zod validation schema.

Frequently Asked Questions about api-designer

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

FAQPage Schema
How do I design type-safe APIs in TypeScript with Zod validation?

Type-safe API design with Zod validation involves defining schemas at the API boundary to validate inputs and derive TypeScript types. This enforces request and response contracts, reducing runtime errors across REST or GraphQL endpoints.

How does Zod schema validation work for TypeScript API endpoints?

Zod schema validation for TypeScript API endpoints works by parsing incoming requests against defined schemas to ensure data integrity. It automatically infers TypeScript types from these schemas, enforcing strict contracts and standardized ApiResponse shapes before processing.

What is the best way to standardize error handling patterns across REST endpoints?

Standardizing error handling patterns across REST endpoints is best achieved by enforcing consistent ApiResponse shapes and validation contracts. Defining type-safe contracts ensures errors are handled uniformly across all services.

Can I generate OpenAPI documentation from type-safe TypeScript contracts?

Yes, you can generate OpenAPI-compatible documentation from type-safe TypeScript contracts. Defining versioned endpoints with validated request and response shapes allows for automated OpenAPI generation to document services.

Does this approach to API design support both REST and GraphQL endpoints?

Yes, this approach to API design supports both REST and GraphQL endpoints in TypeScript projects. It applies type-safe contracts, Zod-based validation, and standardized error handling patterns across both architectural styles.

When should I not use Zod for API type safety and validation?

You should not use Zod for API type safety and validation in non-TypeScript environments or when a project lacks clearly defined API boundaries. It requires TypeScript to derive types and enforce contracts effectively.