Mock REST APIs like standard JSONPlaceholder are great for quick hello-world prototypes. But as soon as your frontend app grows to test GraphQL queries, JWT authentication flows, custom domain entities (like products or orders), or TypeScript auto-completion, standard mock tools quickly hit a brick wall.
A while ago, I launched Playground API—a zero-config, stateful mock API that solved the biggest flaw in mock testing: instant state loss. Playground API introduced zero-login per-session sandboxing, giving frontend developers real state persistence for POST, PUT, PATCH, and DELETE requests without databases or authentication logins.
Following our v2 update (which brought network latency simulation, error injection, and OpenAPI exports), today I’m thrilled to introduce Playground API v3.0! ⚡
v3.0 elevates Playground API from a mock REST API into a complete multi-protocol developer testing ecosystem featuring a GraphQL Sandbox Gateway, Fake JWT Auth Simulation, Dynamic Custom Collections, Dynamic SVG Avatars, and Full TypeScript SDK Definitions.
🆕 What’s New in Playground API v3.0?
