MockGen AI

Generate realistic mock API servers from OpenAPI specs with stateful behavior

Code & DevelopmentFreemium

MockGen AI generates mock API servers from OpenAPI specifications that return realistic fake data matching schema constraints including regex patterns, enum values, and relationship references. The tool supports stateful behavior where POST requests create resources that subsequent GET requests return, simulating CRUD workflows for frontend development without a real backend. It handles pagination, error responses, and rate limiting simulation. Frontend teams use it to develop against API contracts before the backend is ready.

Key Features

• ✓Schema-aware fake data
• ✓Stateful CRUD simulation
• ✓Pagination handling
• ✓Error response simulation
• ✓Rate limiting mockup