What it does

The API Mock Generator is a developer tool that transforms plain-English descriptions or OpenAPI specifications into fully functional, runnable mock servers. It eliminates the multi-hour task of scaffolding backend environments for frontend prototyping or integration testing. By simply describing your data model, the skill generates a complete project directory containing a server with an in-memory data store, realistic sample records, and standard RESTful CRUD endpoints.

Supported tools

• Frameworks: Express.js (Node.js) or Flask (Python)
• Inputs: Natural language descriptions or OpenAPI (YAML/JSON) specs
• Features: CORS enabled, pagination support (?limit, ?offset), and health checks

Why use this skill

Unlike basic LLM prompting which often produces isolated code snippets, this skill builds a structured, multi-file project designed for immediate execution. It handles "boilerplate fatigue" by automatically inferring field types, generating valid mock data for common entities (users, orders, products), and setting up the precise package headers or requirements files needed to run the server locally. It ensures your mock API behaves like a real production environment with proper HTTP status codes and error handling.

The output

The skill creates a mock-server/ directory containing a primary server file (JavaScript or Python), dependency manifests, and a comprehensive README.md documented with auto-generated curl examples for every endpoint.