Designing Self-Documenting REST APIs with OpenAPI 3.0 and Swagger UI

Contract-First API Engineering

Every endpoint in our Blog CMS is backed by an OpenAPI 3.0 specification served at /api/openapi.json and rendered interactively via Swagger UI at /api-docs and /admin/swagger.

Included Endpoints

• GET /api/v1/posts — Paginated, searchable, sortable post catalog
• POST /api/v1/posts — Create new articles with Zod validation
• GET /api/v1/categories & GET /api/v1/tags — Taxonomy management
• GET /api/v1/dashboard/stats — Real-time KPI cards and chart time-series