MockServer

Instantly generate mock API servers from OpenAPI specifications

Code & DevelopmentFreemium

MockServer reads OpenAPI or GraphQL schema definitions and instantly spins up a functioning mock API server that returns realistic fake data matching schema types, validates request payloads against the spec, and simulates configurable error responses, latency, and rate limiting. The tool maintains stateful behavior for CRUD endpoints so POST requests affect subsequent GET responses within a session. Frontend developers use it to build against APIs before the backend is ready while QA engineers use it to test error handling without requiring backend cooperation.

Key Features

• ✓OpenAPI/GraphQL support
• ✓Realistic fake data
• ✓Stateful CRUD behavior
• ✓Error simulation
• ✓Latency injection