api-mock-server

Generate mock API servers with MSW, json-server, and custom handlers.

1|Updated Nov 6, 2025
One-click install
npx skills add https://github.com/zinohome/CozyChat --skill api-mock-server
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: api-mock-server
Source: https://github.com/zinohome/CozyChat/tree/main/.claude/skills/api-mock-server
Command: npx skills add https://github.com/zinohome/CozyChat --skill api-mock-server

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires msw, @faker-js/faker, json-server, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill enables developers to create realistic mock API servers, streamlining the testing and development process by simulating backend responses without needing a live server.

Core Features & Use Cases

  • Flexible Mocking: Supports MSW (Mock Service Worker), json-server, and custom handlers for diverse mocking needs.
  • Realistic Data: Define fixtures, factories, and scenarios to mimic production API behavior, including success, error, and loading states.
  • Use Case: When developing a frontend application, use this Skill to mock the /api/users endpoint to return a list of users, allowing you to build and test the UI even before the backend is fully implemented.

Quick Start

Use the api-mock-server skill to set up an MSW mock server with the provided handlers.

Frequently Asked Questions about api-mock-server

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I mock API endpoints for frontend testing before the backend is built?

You can mock API endpoints for frontend testing by generating a mock server that simulates backend responses without a live server. This allows you to build and test UI components against fixtures and various response scenarios independently.

Can I use MSW and json-server together to simulate API responses in Node.js and browser environments?

Yes, you can use MSW and json-server together to simulate API responses across both browser and Node.js environments. This combination provides comprehensive testing coverage by intercepting network requests and returning custom fixtures.

How does API mocking handle error and loading states during development?

API mocking handles error and loading states by defining specific fixtures, factories, and scenarios to mimic production API behavior. This allows you to simulate success, error, and loading responses to test UI resilience.

What's the best way to generate realistic mock data for API endpoints?

The best way to generate realistic mock data for API endpoints is by using data generation libraries like @faker-js/faker. This allows you to create dynamic factories and fixtures that closely mimic real production data.

When do I need a mock server instead of connecting to a live API?

You need a mock server instead of a live API when you want to streamline development and testing processes without backend dependencies. It is essential for simulating endpoints, data fixtures, and edge cases like errors before the backend is fully implemented.

Does API mocking support custom handlers for complex response scenarios?

Yes, API mocking supports custom handlers for complex response scenarios. You can define custom logic alongside tools like MSW and json-server to simulate diverse mocking needs and specific endpoint behaviors.