Generating REST APIs

Overview

Generate complete, production-ready REST API implementations from OpenAPI specifications, database schemas, or resource definitions. Scaffold CRUD endpoints with proper HTTP method semantics, content negotiation, pagination, filtering, and HATEOAS link generation across Express, FastAPI, Spring Boot, and Gin frameworks.

Prerequisites

• Node.js 18+ with Express/Fastify, or Python 3.10+ with FastAPI/Flask, or Java 17+ with Spring Boot, or Go 1.21+ with Gin/Echo
• OpenAPI 3.0+ specification or database schema (SQL DDL, Prisma, Sequelize models)
• HTTP testing tool: curl, httpie, or Postman
• Database server (PostgreSQL, MySQL, MongoDB) accessible for ORM integration
• Package manager configured (npm, pip, Maven, or go modules)

Instructions

1. Scan the project for existing OpenAPI specs, database models, or route definitions using Glob and Read to establish current API surface area.
2. Parse resource entities from the specification and generate model definitions with field types, validation constraints, and relationship mappings.
3. Create route files implementing all five standard REST operations per resource: GET /resources (list with pagination), GET /resources/:id, POST /resources, PUT /resources/:id, and DELETE /resources/:id.
4. Implement controller logic with input validation using JSON Schema or framework-native validators (Zod, Pydantic, Bean Validation).