FakeStoreAPI vs JSONPlaceholder

FakeStoreAPI returns sample e-commerce data for prototypes: products across four categories, plus carts, users, and a demo login route that issues a JWT. It needs no signup or API key, and every response is JSON.

JSONPlaceholder is one of the longest-running free fake REST APIs, serving a fixed set of 100 posts, 500 comments, 10 users, 100 albums, 5,000 photos, and 200 todos as JSON. Every standard verb works against each resource, including nested routes like /posts/1/comments, though POST/PUT/PATCH/DELETE only simulate a write and return a fake response without persisting any change. Its data and IDs never change, which is exactly why it's the default backend in countless framework tutorials and testing guides.