Mockwave — Simulate any API. Code faster. Test smarter. Ship with confidence.

Mockwave is a free, browser-based mock API tool built for developers who don't want to wait on the backend to move fast.

Whether you're building a new frontend feature, testing edge cases, or developing microservices in isolation — Mockwave gives you a fully functional mock server in seconds, with zero environment setup.

Key Features

✅ Unlimited projects & endpoints — no paywalls, no usage caps, ever.

⚡ Dynamic responses — return different status codes (200, 201, 400, 500…) from the same endpoint based on request conditions.

🔀 Request-aware mocking — read incoming query and body parameters and use them directly inside your mock response.

🧪 Realistic fake data — auto-generate varied, authentic test data using the Faker library. No manual input needed.

💥 Error & delay simulation — inject timeouts, server errors, and random failures to stress-test your app before it hits production.

🔌 Zero setup — just swap your base URL and start testing. No server config, no extra code for happy path scenarios.

Who is it for?

→ Frontend developers blocked by backend dependencies
→ QA engineers who need to cover negative test cases
→ Microservice teams who don't want to spin up the full stack just to test one service
→ Any developer who wants fast, reliable, cost-free API mocking

Why Mockwave?

Most mock API tools either charge you after a free tier, limit your endpoints, or require complex setup. Mockwave is fully free with no hidden limits — built to get out of your way and let you ship faster.

🌐 mockwave.io