Content & Documentation

Swagger/OpenAPI Documentation

Generate and maintain Swagger/OpenAPI documentation for REST APIs with AI-assisted spec writing.

Claude Code Cursor Copilot Codex

Overview

Swagger/OpenAPI provides a standard for describing REST API interfaces. AI coding agents can generate, update, and validate OpenAPI specifications by analyzing your API code, route handlers, and data models.

Agents can automatically generate OpenAPI specs from existing Express, Fastify, or other framework route definitions. They ensure that request/response schemas are accurate, examples are provided, and descriptions are comprehensive. The generated specs power Swagger UI for interactive API documentation.

The workflow supports OpenAPI 3.0 and 3.1, including advanced features like webhooks, security schemes, and server variables. Teams can maintain always-up-to-date API documentation that serves as both reference and testing interface.

Who Is This For?

Generate OpenAPI specs from existing API routes
Add request/response examples to API documentation
Validate API specs against implementation
Create interactive API playground with Swagger UI

Installation

Setup for Claude Code

npm install swagger-ui-express swagger-jsdoc

Configuration

// swagger.config.js
export default {
  definition: {
    openapi: '3.0.0',
    info: {
      title: 'My API',
      version: '1.0.0',
      description: 'API documentation',
    },
    servers: [{ url: 'http://localhost:3000' }],
  },
  apis: ['./routes/*.js'],
};