DummyJSON vs TotalShiftLeft Sandbox

DummyJSON is a free, keyless REST API that serves realistic placeholder data — products, carts, users, todos, recipes, quotes, posts, and comments — with full CRUD support on every resource (writes simulate success but nothing is persisted). Query parameters cover pagination (limit/skip), field selection, sorting, and full-text search, and a dedicated /auth flow issues real JWTs against its seeded users so frontend teams can exercise login and token-refresh flows without standing up a real backend.

TotalShiftLeft's Sandbox (self-titled "API Learning Sandbox") is a free hands-on playground for practicing REST, GraphQL, and SOAP against the same underlying data store — a session is auto-created on first request (no signup) and seeded with demo users, products, and orders that expire after 30 minutes. Beyond plain access, it supports three optional auth flows for testing auth code paths: an x-api-key header, a JWT obtained from POST /auth/token, and an OAuth2 client-credentials exchange at POST /auth/oauth. Query params let callers simulate real-world conditions — added latency, forced error codes, or random failures — making it a fixture for testing API client resilience rather than just CRUD happy paths.