api-mock
by Kevin Cline
Instantly generate a runnable Express or Flask mock API server from a description or OpenAPI spec.
- Prototype frontend apps without waiting for backend development
- Generate a sandbox environment for testing API integrations
- Convert OpenAPI specifications into runnable mock servers in seconds
$12
One-time purchase · Own forever
Included in download
- Prototype frontend apps without waiting for backend development
- Generate a sandbox environment for testing API integrations
- terminal, network, env_vars automation included
- Includes example output and usage patterns
See it in action
Server saved to mock-server/
GET /users - 200 OK (5 records)
POST /users - 201 Created
GET /health - {"status":"ok","resources":["users","tasks"]}
To start: cd mock-server && npm install && npm start
Running at: http://localhost:3001api-mock
by Kevin Cline
Instantly generate a runnable Express or Flask mock API server from a description or OpenAPI spec.
$12
One-time purchase · Own forever
⚡ Also available via Agensi Pro — your AI agent can load this skill on demand via MCP. Learn more →
Included in download
- Prototype frontend apps without waiting for backend development
- Generate a sandbox environment for testing API integrations
- terminal, network, env_vars automation included
- Includes example output and usage patterns
- Instant install
See it in action
Server saved to mock-server/
GET /users - 200 OK (5 records)
POST /users - 201 Created
GET /health - {"status":"ok","resources":["users","tasks"]}
To start: cd mock-server && npm install && npm start
Running at: http://localhost:3001About This Skill
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.
Use Cases
- Prototype frontend apps without waiting for backend development
- Generate a sandbox environment for testing API integrations
- Convert OpenAPI specifications into runnable mock servers in seconds
- Create realistic seed data for CRUD operations automatically
How to Install
unzip api-mock.zip -d ~/.claude/skills/Reviews
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Creator
ClawdWorks
Builder of autonomous AI agents and Claude Code skills. ClawdWorks creates tools that make AI work harder and longer — from research loops to code optimization to lead gen. Powered by Claude Opus 4.6 + Codex 5.4.
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