Frequently Asked Questions

Mock66 is a developer tool that lets you instantly create mock REST API endpoints. It helps frontend developers, UI designers, and QA engineers build and test their applications without waiting for the actual backend to be ready.

Hardcoded JSON doesn't simulate real-world conditions. With Mock66, you can simulate network delays (latency) to test loading states, force error states (like 500 or 401 errors), and generate dynamic data so your UI isn't showing the same static content every time.

Yes. You can add a custom delay (in milliseconds) to any endpoint. This is perfect for testing your loading skeletons and spinners to ensure they look good to users on slower networks.

Both! You can paste a static JSON object to return it exactly as is, or use our Schema Builder to define fields (like 'random name', 'uuid', 'date'). We'll generate fresh, randomized data for every single request.

Yes! You can get started for free with a generous limit on endpoints and monthly requests. It’s perfect for side projects and prototypes. You can upgrade anytime via your dashboard.

Absolutely. All Mock66 endpoints come with CORS enabled by default, so you can call them directly from your localhost, deployed frontend, or mobile app without any Cross-Origin errors.