API Builder

Overview

API Builder accelerates backend development by generating production-ready API endpoints from high-level descriptions. Whether you need a REST API with Express or a GraphQL server with Apollo, this skill handles the boilerplate while you focus on business logic.

Key Features

• Route Scaffolding: Describe your resources and relationships, and the skill generates CRUD endpoints with proper HTTP methods, status codes, and response formats.
• Input Validation: Every endpoint includes request validation using Zod or Joi schemas, with meaningful error messages for invalid inputs.
• Auth Middleware: Generates JWT or session-based authentication middleware with role-based access control out of the box.
• OpenAPI Generation: Automatically produces OpenAPI 3.1 documentation that stays in sync with your code, including request/response examples.

Supported Frameworks

Express.js, Fastify, Hono, and Koa for REST APIs. Apollo Server and Yoga for GraphQL. Python support includes FastAPI and Flask. Each framework follows its idiomatic patterns and best practices.

Architecture Patterns

The skill supports controller-service-repository layering, dependency injection, and middleware composition. Generated code is modular and easy to extend without modifying generated files.