Mocklantis

The product is a desktop mock server for REST, WebSocket, and SSE that lets users create mock APIs, test endpoints, and simulate failures, delays, and stateful flows without deploying real services. It is for software developers, frontend developers, QA engineers, and API designers in solo and team workflows who need to build and test against APIs before backends are ready. It is delivered as a local desktop application that runs on localhost with data stored locally and no cloud dependency.

Key features

• Mock REST HTTP endpoints
• Mock WebSocket with 3 modes
• Mock SSE streaming
• State machine with visual flow editor
• Multiple responses per endpoint
• Sequential, random, repeat-last modes
• Request count and expire time controls
• Chaos engineering failure simulation
• Response corruption and malformed JSON
• Latency injection fixed and random
• Error simulation and rate limiting
• Advanced WebSocket message matching
• Proxy mode for hybrid testing
• API recording to auto-create mocks
• Triggered webhooks with auth
• No server restart live updates
• Auto-save every 500ms
• Dark theme interface