OpenAPI Overlays Let One Products API Speak Four Languages (opens in new tab)

I keep a small, deliberately boring API around for teaching: a Products API. It does exactly what you’d expect — list products, create a product, fetch one, update it, delete it, cancel it — and nothing more. It is a template, not a production service, and that is the whole point. When I want to demonstrate a concept without the noise of a real business domain getting in the way, the Products API is the canvas. Lately the concept I’ve been demonstrating on it is overlays, because overlays sol...