When building frontend applications, testing mobile apps, or writing automated QA suites, developers constantly face a frustrating dilemma:
Traditional mock APIs (like JSONPlaceholder) are easy to use, but they instantly discard your POST, PUT, and DELETE requests. The moment you refresh your React/Vue app, your newly created items disappear into thin air.
Spinning up your own backend (Express/Nest/Prisma) takes time, requires database migrations, environment variables, and maintenance just to test a prototype or write UI tests.
That’s why I built Playground API—a free, open-source mock REST & GraphQL API service with zero-login per-session state persistence. Your mutations persist across requests for your session identity while global seed datasets remain read-only for other visitors.
Following our previous releases (which introduced GraphQL Gateway, Fake JWT Auth, and Dynamic Custom Collections), today I’m thrilled to announce Playground API v4.0! ⚡
