Backend2026-05-17
OpenAPI
Also known as: OpenAPI / Swagger / OAS / オープンAPI
The standard YAML/JSON specification for describing REST APIs (formerly Swagger). Machine-readable endpoint, parameter, and schema definitions enable automatic client SDK generation, validation, and test automation.
Overview
OpenAPI 3.x defines request and response schemas in JSONSchema format. FastAPI and Hono generate OpenAPI documents automatically from code. Serving an interactive Swagger UI is now standard practice.
AI Agent Integration
ChatGPT plugins and Claude tool definitions both use OpenAPI format, making it an increasingly important interface description standard for LLM agents calling external APIs. See Hono implementation guide.
Related Columns
Software Dev
Hono Implementation Guide — Zod Validation, OpenAPI & JWT Auth for Production-Grade APIs [2026]
A comprehensive guide to building production-grade APIs with Hono using Zod validation, JWT authentication, and auto-generated OpenAPI specs. Covers CORS, rate limiting, error handling, logging, and Swagger UI integration.
Software Dev
Hono vs Express vs Fastify vs Elysia — 2026 Node.js/Bun Framework Comparison Guide
In-depth 2026 comparison of Hono, Express, Fastify, and Elysia across performance, type safety, ecosystem, and learning curve — with up-to-date benchmarks and a use-case selection guide.
Software Development
Claude Code Agent SDK — Custom AI Agent Development Guide | Python Implementation and Multi-Agent Architecture
Complete guide to custom AI agent development using Claude Code Agent SDK. Covers Python implementation, custom tool definition, Hook implementation, sub-agent utilization, multi-agent orchestration, and CI/CD integration patterns for enterprise applications.
Feel free to contact us
Contact Us